diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
index 42bf8db..43960a1 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
@@ -98,14 +98,7 @@
     }
 
     /** Called when an icon is launched. */
-    @CallSuper
-    public void onTaskbarIconLaunched(ItemInfo item) {
-        // When launching from Taskbar, e.g. from Overview, set FLAG_IN_APP immediately instead of
-        // waiting for onPause, to reduce potential visual noise during the app open transition.
-        if (mControllers.taskbarStashController == null) return;
-        mControllers.taskbarStashController.updateStateForFlag(FLAG_IN_APP, true);
-        mControllers.taskbarStashController.applyState();
-    }
+    public void onTaskbarIconLaunched(ItemInfo item) { }
 
     public View getRootView() {
         return mControllers.taskbarActivityContext.getDragLayer();
@@ -232,7 +225,7 @@
         }
 
         recentsView.getSplitSelectController().findLastActiveTasksAndRunCallback(
-                Collections.singletonList(splitSelectSource.itemInfo.getComponentKey()),
+                Collections.singletonList(splitSelectSource.getItemInfo().getComponentKey()),
                 false /* findExactPairMatch */,
                 foundTasks -> {
                     @Nullable Task foundTask = foundTasks[0];
@@ -249,6 +242,13 @@
      * Uses the clicked Taskbar icon to launch a second app for splitscreen.
      */
     public void triggerSecondAppForSplit(ItemInfoWithIcon info, Intent intent, View startingView) {
+        // When launching from Taskbar, e.g. from Overview, set FLAG_IN_APP immediately
+        // to reduce potential visual noise during the app open transition.
+        if (mControllers.taskbarStashController != null) {
+            mControllers.taskbarStashController.updateStateForFlag(FLAG_IN_APP, true);
+            mControllers.taskbarStashController.applyState();
+        }
+
         RecentsView recents = getRecentsView();
         recents.getSplitSelectController().findLastActiveTasksAndRunCallback(
                 Collections.singletonList(info.getComponentKey()),
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java
index ffab936..1f0851f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarView.java
@@ -1320,7 +1320,7 @@
     }
 
     /** Returns the child count excluding the overflow if it's present. */
-    private int getBubbleChildCount() {
+    int getBubbleChildCount() {
         return hasOverflow() ? getChildCount() - 1 : getChildCount();
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
index f66b350..1d74b28 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
@@ -592,9 +592,8 @@
     public void animateBubbleNotification(BubbleBarBubble bubble, boolean isExpanding,
             boolean isUpdate) {
         boolean isInApp = mTaskbarStashController.isInApp();
-        // if this is the first bubble, animate to the initial state. one bubble is the overflow
-        // so check for at most 2 children.
-        if (mBarView.getChildCount() <= 2 && !isUpdate) {
+        // if this is the first bubble, animate to the initial state.
+        if (mBarView.getBubbleChildCount() == 1 && !isUpdate) {
             mBubbleBarViewAnimator.animateToInitialState(bubble, isInApp, isExpanding);
             return;
         }
diff --git a/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java b/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
index bb33c18..17735e1 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
@@ -729,7 +729,7 @@
         // Check if there is already an instance of this app running, if so, initiate the split
         // using that.
         mSplitSelectStateController.findLastActiveTasksAndRunCallback(
-                Collections.singletonList(splitSelectSource.itemInfo.getComponentKey()),
+                Collections.singletonList(splitSelectSource.getItemInfo().getComponentKey()),
                 false /* findExactPairMatch */,
                 foundTasks -> {
                     @Nullable Task foundTask = foundTasks[0];
@@ -756,7 +756,7 @@
         Rect tempRect = new Rect();
 
         mSplitSelectStateController.setInitialTaskSelect(source.intent,
-                source.position.stagePosition, source.itemInfo, source.splitEvent,
+                source.position.stagePosition, source.getItemInfo(), source.splitEvent,
                 source.alreadyRunningTaskId);
 
         RecentsView recentsView = getOverviewPanel();
@@ -774,6 +774,8 @@
         floatingTaskView.setOnClickListener(view ->
                 mSplitSelectStateController.getSplitAnimationController().
                         playAnimPlaceholderToFullscreen(this, view, Optional.empty()));
+        floatingTaskView.setContentDescription(source.getItemInfo().contentDescription);
+
         mSplitSelectStateController.setFirstFloatingTaskView(floatingTaskView);
         anim.addListener(new AnimatorListenerAdapter() {
             @Override
diff --git a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
index d82426f..ca19480 100644
--- a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
+++ b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
@@ -274,6 +274,15 @@
         return mActivityInterface;
     }
 
+    /**
+     * Get the current container control helper for managing interactions to the overview activity.
+     *
+     * @return the current container control helper
+     */
+    public BaseContainerInterface<?, ?> getContainerInterface() {
+        return mActivityInterface;
+    }
+
     public void dump(PrintWriter pw) {
         pw.println("OverviewComponentObserver:");
         pw.println("  isDefaultHome=" + mIsDefaultHome);
diff --git a/quickstep/src/com/android/quickstep/QuickstepTestInformationHandler.java b/quickstep/src/com/android/quickstep/QuickstepTestInformationHandler.java
index b4b8c5b..b290f83 100644
--- a/quickstep/src/com/android/quickstep/QuickstepTestInformationHandler.java
+++ b/quickstep/src/com/android/quickstep/QuickstepTestInformationHandler.java
@@ -1,13 +1,16 @@
 package com.android.quickstep;
 
 import static com.android.launcher3.taskbar.TaskbarThresholdUtils.getFromNavThreshold;
+import static com.android.launcher3.testing.shared.TestProtocol.OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH;
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
 import android.app.Activity;
 import android.content.Context;
 import android.content.res.Resources;
+import android.graphics.PointF;
 import android.graphics.Rect;
 import android.os.Bundle;
+import android.util.Log;
 
 import androidx.annotation.Nullable;
 
@@ -20,6 +23,7 @@
 import com.android.quickstep.util.LayoutUtils;
 import com.android.quickstep.util.TISBindHelper;
 import com.android.quickstep.views.RecentsView;
+import com.android.quickstep.views.RecentsViewContainer;
 
 import java.util.ArrayList;
 import java.util.concurrent.CountDownLatch;
@@ -77,26 +81,39 @@
                 return response;
             }
 
-            case TestProtocol.REQUEST_GET_FOCUSED_TASK_HEIGHT_FOR_TABLET: {
-                if (!mDeviceProfile.isTablet) {
-                    return null;
-                }
-                Rect focusedTaskRect = new Rect();
+            case TestProtocol.REQUEST_GET_OVERVIEW_TASK_SIZE: {
+                Log.d(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH, "== REQUEST_GET_OVERVIEW_TASK_SIZE ==");
+                Rect gridSize = new Rect();
+                LauncherActivityInterface.INSTANCE.calculateGridSize(mDeviceProfile, mContext,
+                        gridSize);
+                Log.d(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH, "gridSize: " + gridSize);
+                PointF taskDimension = new PointF();
+                LauncherActivityInterface.getTaskDimension(mContext, mDeviceProfile, taskDimension);
+                Log.d(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH,
+                        "taskbarHeight: " + mDeviceProfile.taskbarHeight);
+                Log.d(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH, "taskDimension: " + taskDimension);
+                Rect taskSize = new Rect();
                 LauncherActivityInterface.INSTANCE.calculateTaskSize(mContext, mDeviceProfile,
-                        focusedTaskRect, RecentsPagedOrientationHandler.PORTRAIT);
-                response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD, focusedTaskRect.height());
-                return response;
+                        taskSize, RecentsPagedOrientationHandler.PORTRAIT);
+                Log.d(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH, "calculateTaskSize: " + taskSize);
+                return getUIProperty(Bundle::putParcelable,
+                        recentsViewContainer -> {
+                            Rect lastComputedTaskSize =
+                                    recentsViewContainer.<RecentsView<?, ?>>getOverviewPanel()
+                                            .getLastComputedTaskSize();
+                            Log.d(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH,
+                                    "lastComputedTaskSize: " + lastComputedTaskSize);
+                            return lastComputedTaskSize;
+                        },
+                        this::getRecentsViewContainer);
             }
 
-            case TestProtocol.REQUEST_GET_GRID_TASK_SIZE_RECT_FOR_TABLET: {
-                if (!mDeviceProfile.isTablet) {
-                    return null;
-                }
-                Rect gridTaskRect = new Rect();
-                LauncherActivityInterface.INSTANCE.calculateGridTaskSize(mContext, mDeviceProfile,
-                        gridTaskRect, RecentsPagedOrientationHandler.PORTRAIT);
-                response.putParcelable(TestProtocol.TEST_INFO_RESPONSE_FIELD, gridTaskRect);
-                return response;
+            case TestProtocol.REQUEST_GET_OVERVIEW_GRID_TASK_SIZE: {
+                return getUIProperty(Bundle::putParcelable,
+                        recentsViewContainer ->
+                                recentsViewContainer.<RecentsView<?, ?>>getOverviewPanel()
+                                        .getLastComputedGridTaskSize(),
+                        this::getRecentsViewContainer);
             }
 
             case TestProtocol.REQUEST_GET_OVERVIEW_PAGE_SPACING: {
@@ -221,6 +238,17 @@
         }
     }
 
+    private RecentsViewContainer getRecentsViewContainer() {
+        RecentsAnimationDeviceState rads = new RecentsAnimationDeviceState(mContext);
+        OverviewComponentObserver observer = new OverviewComponentObserver(mContext, rads);
+        try {
+            return observer.getContainerInterface().getCreatedContainer();
+        } finally {
+            observer.onDestroy();
+            rads.destroy();
+        }
+    }
+
     @Override
     protected boolean isLauncherInitialized() {
         return super.isLauncherInitialized() && TouchInteractionService.isInitialized();
diff --git a/quickstep/src/com/android/quickstep/TaskAnimationManager.java b/quickstep/src/com/android/quickstep/TaskAnimationManager.java
index ab80a8c..85eea3b 100644
--- a/quickstep/src/com/android/quickstep/TaskAnimationManager.java
+++ b/quickstep/src/com/android/quickstep/TaskAnimationManager.java
@@ -112,8 +112,9 @@
      */
     public void preloadRecentsAnimation(Intent intent) {
         // Pass null animation handler to indicate this start is for preloading
-        UI_HELPER_EXECUTOR.execute(() -> ActivityManagerWrapper.getInstance()
-                .startRecentsActivity(intent, 0, null, null, null));
+        UI_HELPER_EXECUTOR.execute(() -> {
+            ActivityManagerWrapper.getInstance().preloadRecentsActivity(intent);
+        });
     }
 
     boolean shouldIgnoreMotionEvents() {
@@ -327,63 +328,43 @@
         mCallbacks.addListener(gestureState);
         mCallbacks.addListener(listener);
 
-        if (ENABLE_SHELL_TRANSITIONS) {
-            final ActivityOptions options = ActivityOptions.makeBasic();
-            options.setPendingIntentBackgroundActivityStartMode(
-                    ActivityOptions.MODE_BACKGROUND_ACTIVITY_START_ALLOW_ALWAYS);
-            // Use regular (non-transient) launch for all apps page to control IME.
-            if (!containerInterface.allowAllAppsFromOverview()) {
-                options.setTransientLaunch();
-            }
-            options.setSourceInfo(ActivityOptions.SourceInfo.TYPE_RECENTS_ANIMATION, eventTime);
+        final ActivityOptions options = ActivityOptions.makeBasic();
+        options.setPendingIntentBackgroundActivityStartMode(
+                ActivityOptions.MODE_BACKGROUND_ACTIVITY_START_ALLOW_ALWAYS);
+        // Use regular (non-transient) launch for all apps page to control IME.
+        if (!containerInterface.allowAllAppsFromOverview()) {
+            options.setTransientLaunch();
+        }
+        options.setSourceInfo(ActivityOptions.SourceInfo.TYPE_RECENTS_ANIMATION, eventTime);
 
-            // Notify taskbar that we should skip reacting to launcher visibility change to
-            // avoid a jumping taskbar.
-            TaskbarUIController taskbarUIController = containerInterface.getTaskbarController();
-            if (enableScalingRevealHomeAnimation() && taskbarUIController != null) {
-                taskbarUIController.setSkipLauncherVisibilityChange(true);
+        // Notify taskbar that we should skip reacting to launcher visibility change to
+        // avoid a jumping taskbar.
+        TaskbarUIController taskbarUIController = containerInterface.getTaskbarController();
+        if (enableScalingRevealHomeAnimation() && taskbarUIController != null) {
+            taskbarUIController.setSkipLauncherVisibilityChange(true);
 
-                mCallbacks.addListener(new RecentsAnimationCallbacks.RecentsAnimationListener() {
-                    @Override
-                    public void onRecentsAnimationCanceled(
-                            @NonNull HashMap<Integer, ThumbnailData> thumbnailDatas) {
-                        taskbarUIController.setSkipLauncherVisibilityChange(false);
-                    }
+            mCallbacks.addListener(new RecentsAnimationCallbacks.RecentsAnimationListener() {
+                @Override
+                public void onRecentsAnimationCanceled(
+                        @NonNull HashMap<Integer, ThumbnailData> thumbnailDatas) {
+                    taskbarUIController.setSkipLauncherVisibilityChange(false);
+                }
 
-                    @Override
-                    public void onRecentsAnimationFinished(
-                            @NonNull RecentsAnimationController controller) {
-                        taskbarUIController.setSkipLauncherVisibilityChange(false);
-                    }
-                });
-            }
+                @Override
+                public void onRecentsAnimationFinished(
+                        @NonNull RecentsAnimationController controller) {
+                    taskbarUIController.setSkipLauncherVisibilityChange(false);
+                }
+            });
+        }
 
-            mRecentsAnimationStartPending = getSystemUiProxy()
-                    .startRecentsActivity(intent, options, mCallbacks);
-            if (enableHandleDelayedGestureCallbacks()) {
-                ActiveGestureLog.INSTANCE.addLog(new ActiveGestureLog.CompoundString(
-                        "TaskAnimationManager.startRecentsAnimation(shell transition path): ")
-                        .append("Setting mRecentsAnimationStartPending = ")
-                        .append(mRecentsAnimationStartPending));
-            }
-        } else {
-            UI_HELPER_EXECUTOR.execute(
-                    () -> ActivityManagerWrapper.getInstance().startRecentsActivity(
-                            intent,
-                            eventTime,
-                            mCallbacks,
-                            result -> {
-                                if (enableHandleDelayedGestureCallbacks()) {
-                                    ActiveGestureLog.INSTANCE.addLog(
-                                            new ActiveGestureLog.CompoundString(
-                                                    "TaskAnimationManager.startRecentsAnimation")
-                                                    .append("(legacy path): Setting ")
-                                                    .append("mRecentsAnimationStartPending = ")
-                                                    .append(result));
-                                }
-                                mRecentsAnimationStartPending = result;
-                            },
-                            MAIN_EXECUTOR.getHandler()));
+        mRecentsAnimationStartPending = getSystemUiProxy()
+                .startRecentsActivity(intent, options, mCallbacks);
+        if (enableHandleDelayedGestureCallbacks()) {
+            ActiveGestureLog.INSTANCE.addLog(new ActiveGestureLog.CompoundString(
+                    "TaskAnimationManager.startRecentsAnimation: ")
+                    .append("Setting mRecentsAnimationStartPending = ")
+                    .append(mRecentsAnimationStartPending));
         }
         gestureState.setState(STATE_RECENTS_ANIMATION_INITIALIZED);
         return mCallbacks;
diff --git a/quickstep/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java b/quickstep/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java
index f264364..3ca7191 100644
--- a/quickstep/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java
+++ b/quickstep/src/com/android/quickstep/inputconsumers/DeviceLockedInputConsumer.java
@@ -58,7 +58,6 @@
 import com.android.quickstep.util.TransformParams;
 import com.android.quickstep.util.TransformParams.BuilderProxy;
 import com.android.systemui.shared.recents.model.ThumbnailData;
-import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.shared.system.InputMonitorCompat;
 
 import java.util.HashMap;
@@ -278,9 +277,7 @@
     }
 
     private void endRemoteAnimation() {
-        if (mHomeLaunched) {
-            ActivityManagerWrapper.getInstance().cancelRecentsAnimation(false);
-        } else if (mRecentsAnimationController != null) {
+        if (mRecentsAnimationController != null) {
             mRecentsAnimationController.finishController(
                     false /* toRecents */, null /* callback */, false /* sendUserLeaveHint */);
         }
diff --git a/quickstep/src/com/android/quickstep/util/ActiveGestureLog.java b/quickstep/src/com/android/quickstep/util/ActiveGestureLog.java
index c54862a..d46b8fc 100644
--- a/quickstep/src/com/android/quickstep/util/ActiveGestureLog.java
+++ b/quickstep/src/com/android/quickstep/util/ActiveGestureLog.java
@@ -23,6 +23,7 @@
 import java.io.PrintWriter;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Date;
 import java.util.List;
 import java.util.Locale;
@@ -237,7 +238,8 @@
     /** An entire log of entries associated with a single log ID */
     protected static class EventLog {
 
-        protected final List<EventEntry> eventEntries = new ArrayList<>();
+        protected final List<EventEntry> eventEntries =
+                Collections.synchronizedList(new ArrayList<>());
         protected final int logId;
         protected final boolean mIsFullyGesturalNavMode;
 
diff --git a/quickstep/src/com/android/quickstep/util/SplitAnimationController.kt b/quickstep/src/com/android/quickstep/util/SplitAnimationController.kt
index 0335fa1..fa5a67a 100644
--- a/quickstep/src/com/android/quickstep/util/SplitAnimationController.kt
+++ b/quickstep/src/com/android/quickstep/util/SplitAnimationController.kt
@@ -91,7 +91,8 @@
             val iconDrawable: Drawable,
             val fadeWithThumbnail: Boolean,
             val isStagedTask: Boolean,
-            val iconView: View?
+            val iconView: View?,
+            val contentDescription: CharSequence?
         )
     }
 
@@ -112,7 +113,8 @@
                 splitSelectSource.drawable,
                 fadeWithThumbnail = false,
                 isStagedTask = true,
-                iconView = null
+                iconView = null,
+                splitSelectSource.itemInfo.contentDescription
             )
         } else if (splitSelectStateController.isDismissingFromSplitPair) {
             // Initiating split from overview, but on a split pair
@@ -126,7 +128,8 @@
                         drawable,
                         fadeWithThumbnail = true,
                         isStagedTask = true,
-                        iconView = container.iconView.asView()
+                        iconView = container.iconView.asView(),
+                        container.task.titleDescription
                     )
                 }
             }
@@ -145,7 +148,8 @@
                     drawable,
                     fadeWithThumbnail = true,
                     isStagedTask = true,
-                    iconView = it.iconView.asView()
+                    iconView = it.iconView.asView(),
+                    it.task.titleDescription
                 )
             }
         }
diff --git a/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java b/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
index 2ff8e45..431cfbe 100644
--- a/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
+++ b/quickstep/src/com/android/quickstep/util/SplitSelectStateController.java
@@ -55,7 +55,6 @@
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.RemoteException;
-import android.os.SystemClock;
 import android.os.UserHandle;
 import android.util.Log;
 import android.util.Pair;
@@ -97,7 +96,6 @@
 import com.android.quickstep.views.RecentsViewContainer;
 import com.android.quickstep.views.SplitInstructionsView;
 import com.android.systemui.shared.recents.model.Task;
-import com.android.systemui.shared.system.ActivityManagerWrapper;
 import com.android.systemui.shared.system.InteractionJankMonitorWrapper;
 import com.android.systemui.shared.system.QuickStepContract;
 import com.android.wm.shell.shared.split.SplitScreenConstants.PersistentSnapPosition;
@@ -883,14 +881,17 @@
             DesktopSplitRecentsAnimationListener listener =
                     new DesktopSplitRecentsAnimationListener(splitPosition, taskBounds);
 
-            MAIN_EXECUTOR.execute(() -> {
-                callbacks.addListener(listener);
-                UI_HELPER_EXECUTOR.execute(
-                        // Transition from app to enter stage split in launcher with
-                        // recents animation.
-                        () -> ActivityManagerWrapper.getInstance().startRecentsActivity(
-                                mOverviewComponentObserver.getOverviewIntent(),
-                                SystemClock.uptimeMillis(), callbacks, null, null));
+            callbacks.addListener(listener);
+            UI_HELPER_EXECUTOR.execute(() -> {
+                // Transition from app to enter stage split in launcher with recents animation
+                final ActivityOptions options = ActivityOptions.makeBasic();
+                options.setPendingIntentBackgroundActivityStartMode(
+                        ActivityOptions.MODE_BACKGROUND_ACTIVITY_START_ALLOW_ALWAYS);
+                options.setTransientLaunch();
+                SystemUiProxy.INSTANCE.get(mLauncher.getApplicationContext())
+                        .startRecentsActivity(
+                                mOverviewComponentObserver.getOverviewIntent(), options,
+                                callbacks);
             });
         }
 
diff --git a/quickstep/src/com/android/quickstep/util/SplitWithKeyboardShortcutController.java b/quickstep/src/com/android/quickstep/util/SplitWithKeyboardShortcutController.java
index 27fb31d..1c417eb 100644
--- a/quickstep/src/com/android/quickstep/util/SplitWithKeyboardShortcutController.java
+++ b/quickstep/src/com/android/quickstep/util/SplitWithKeyboardShortcutController.java
@@ -27,9 +27,9 @@
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.app.ActivityManager;
+import android.app.ActivityOptions;
 import android.graphics.Rect;
 import android.graphics.RectF;
-import android.os.SystemClock;
 
 import androidx.annotation.BinderThread;
 
@@ -91,12 +91,17 @@
 
         MAIN_EXECUTOR.execute(() -> {
             callbacks.addListener(listener);
-            UI_HELPER_EXECUTOR.execute(
-                    // Transition from fullscreen app to enter stage split in launcher with
-                    // recents animation.
-                    () -> ActivityManagerWrapper.getInstance().startRecentsActivity(
-                            mOverviewComponentObserver.getOverviewIntent(),
-                            SystemClock.uptimeMillis(), callbacks, null, null));
+            UI_HELPER_EXECUTOR.execute(() -> {
+                // Transition from fullscreen app to enter stage split in launcher with
+                // recents animation
+                final ActivityOptions options = ActivityOptions.makeBasic();
+                options.setPendingIntentBackgroundActivityStartMode(
+                        ActivityOptions.MODE_BACKGROUND_ACTIVITY_START_ALLOW_ALWAYS);
+                options.setTransientLaunch();
+                SystemUiProxy.INSTANCE.get(mLauncher.getApplicationContext())
+                        .startRecentsActivity(mOverviewComponentObserver.getOverviewIntent(),
+                                ActivityOptions.makeBasic(), callbacks);
+            });
         });
     }
 
@@ -110,17 +115,17 @@
 
         private final boolean mLeftOrTop;
         private final Rect mTempRect = new Rect();
+        private final ActivityManager.RunningTaskInfo mRunningTaskInfo;
 
         private SplitWithKeyboardShortcutRecentsAnimationListener(boolean leftOrTop) {
             mLeftOrTop = leftOrTop;
+            mRunningTaskInfo = ActivityManagerWrapper.getInstance().getRunningTask();
         }
 
         @Override
         public void onRecentsAnimationStart(RecentsAnimationController controller,
                 RecentsAnimationTargets targets) {
-            ActivityManager.RunningTaskInfo runningTaskInfo =
-                    ActivityManagerWrapper.getInstance().getRunningTask();
-            mController.setInitialTaskSelect(runningTaskInfo,
+            mController.setInitialTaskSelect(mRunningTaskInfo,
                     mLeftOrTop ? STAGE_POSITION_TOP_OR_LEFT : STAGE_POSITION_BOTTOM_OR_RIGHT,
                     null /* itemInfo */,
                     mLeftOrTop ? LAUNCHER_KEYBOARD_SHORTCUT_SPLIT_LEFT_TOP
@@ -136,9 +141,9 @@
             RectF startingTaskRect = new RectF();
             final FloatingTaskView floatingTaskView = FloatingTaskView.getFloatingTaskView(
                     mLauncher, mLauncher.getDragLayer(),
-                    controller.screenshotTask(runningTaskInfo.taskId).getThumbnail(),
+                    controller.screenshotTask(mRunningTaskInfo.taskId).getThumbnail(),
                     null /* icon */, startingTaskRect);
-            Task task = Task.from(new Task.TaskKey(runningTaskInfo), runningTaskInfo,
+            Task task = Task.from(new Task.TaskKey(mRunningTaskInfo), mRunningTaskInfo,
                     false /* isLocked */);
             RecentsModel.INSTANCE.get(mLauncher.getApplicationContext())
                     .getIconCache()
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 53e6e72..bb2a12f 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -3450,6 +3450,7 @@
                 mSplitSelectStateController.getSplitAnimationController().
                         playAnimPlaceholderToFullscreen(mContainer, view,
                                 Optional.of(() -> resetFromSplitSelectionState())));
+        firstFloatingTaskView.setContentDescription(splitAnimInitProps.getContentDescription());
 
         // SplitInstructionsView: animate in
         safeRemoveDragLayerView(mSplitSelectStateController.getSplitInstructionsView());
@@ -4883,7 +4884,7 @@
         mSplitSelectStateController.setDismissingFromSplitPair(mSplitHiddenTaskView != null
                 && mSplitHiddenTaskView instanceof GroupedTaskView);
         mSplitSelectStateController.setInitialTaskSelect(splitSelectSource.intent,
-                splitSelectSource.position.stagePosition, splitSelectSource.itemInfo,
+                splitSelectSource.position.stagePosition, splitSelectSource.getItemInfo(),
                 splitSelectSource.splitEvent, splitSelectSource.alreadyRunningTaskId);
         updateDesktopTaskVisibility(false /* visible */);
     }
diff --git a/quickstep/tests/multivalentScreenshotTests/src/com/android/launcher3/taskbar/bubbles/BubbleViewScreenshotTest.kt b/quickstep/tests/multivalentScreenshotTests/src/com/android/launcher3/taskbar/bubbles/BubbleViewScreenshotTest.kt
index 3e0d6b5..d77ac5c 100644
--- a/quickstep/tests/multivalentScreenshotTests/src/com/android/launcher3/taskbar/bubbles/BubbleViewScreenshotTest.kt
+++ b/quickstep/tests/multivalentScreenshotTests/src/com/android/launcher3/taskbar/bubbles/BubbleViewScreenshotTest.kt
@@ -15,6 +15,7 @@
  */
 package com.android.launcher3.taskbar.bubbles
 
+import android.app.Notification
 import android.content.Context
 import android.graphics.Bitmap
 import android.graphics.Canvas
@@ -72,7 +73,7 @@
     fun bubbleView_seen() {
         screenshotRule.screenshotTest("bubbleView_seen") { activity ->
             activity.actionBar?.hide()
-            setupBubbleView().apply { markSeen() }
+            setupBubbleView(suppressNotification = true)
         }
     }
 
@@ -84,7 +85,7 @@
         }
     }
 
-    private fun setupBubbleView(): BubbleView {
+    private fun setupBubbleView(suppressNotification: Boolean = false): BubbleView {
         val inflater = LayoutInflater.from(context)
 
         val iconSize = 100
@@ -95,7 +96,10 @@
         val icon = createCircleBitmap(radius = iconSize / 2, color = Color.LTGRAY)
         val badge = createCircleBitmap(radius = badgeRadius.toInt(), color = Color.RED)
 
-        val bubbleInfo = BubbleInfo("key", 0, null, null, 0, context.packageName, null, null, false)
+        val flags =
+            if (suppressNotification) Notification.BubbleMetadata.FLAG_SUPPRESS_NOTIFICATION else 0
+        val bubbleInfo =
+            BubbleInfo("key", flags, null, null, 0, context.packageName, null, null, false)
         val bubbleView = inflater.inflate(R.layout.bubblebar_item_view, null) as BubbleView
         val dotPath =
             PathParser.createPathFromPathData(
diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/util/SplitAnimationControllerTest.kt b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/SplitAnimationControllerTest.kt
index f3cde52..5051251 100644
--- a/quickstep/tests/multivalentTests/src/com/android/quickstep/util/SplitAnimationControllerTest.kt
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/SplitAnimationControllerTest.kt
@@ -27,6 +27,7 @@
 import android.window.TransitionInfo
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.android.launcher3.apppairs.AppPairIcon
+import com.android.launcher3.model.data.ItemInfo
 import com.android.launcher3.statehandlers.DepthController
 import com.android.launcher3.statemanager.StateManager
 import com.android.launcher3.taskbar.TaskbarActivityContext
@@ -76,6 +77,7 @@
     private val splitSelectSource: SplitConfigurationOptions.SplitSelectSource = mock()
     private val mockSplitSourceDrawable: Drawable = mock()
     private val mockSplitSourceView: View = mock()
+    private val mockItemInfo: ItemInfo = mock()
 
     private val stateManager: StateManager<*, *> = mock()
     private val depthController: DepthController = mock()
@@ -89,11 +91,13 @@
         whenever(mockTaskContainer.snapshotView).thenReturn(mockSnapshotView)
         whenever(mockTaskContainer.splitAnimationThumbnail).thenReturn(mockBitmap)
         whenever(mockTaskContainer.iconView).thenReturn(mockIconView)
+        whenever(mockTaskContainer.task).thenReturn(mockTask)
         whenever(mockIconView.drawable).thenReturn(mockTaskViewDrawable)
         whenever(mockTaskView.taskContainers).thenReturn(List(1) { mockTaskContainer })
 
         whenever(splitSelectSource.drawable).thenReturn(mockSplitSourceDrawable)
         whenever(splitSelectSource.view).thenReturn(mockSplitSourceView)
+        whenever(splitSelectSource.itemInfo).thenReturn(mockItemInfo)
 
         splitAnimationController = SplitAnimationController(mockSplitSelectStateController)
     }
diff --git a/quickstep/tests/src/com/android/quickstep/FallbackRecentsTest.java b/quickstep/tests/src/com/android/quickstep/FallbackRecentsTest.java
index 2858929..2e456a7 100644
--- a/quickstep/tests/src/com/android/quickstep/FallbackRecentsTest.java
+++ b/quickstep/tests/src/com/android/quickstep/FallbackRecentsTest.java
@@ -248,6 +248,7 @@
     }
 
     @Test
+    @ScreenRecordRule.ScreenRecord // b/355042336
     public void testOverview() throws IOException {
         startAppFast(getAppPackageName());
         startAppFast(resolveSystemApp(Intent.CATEGORY_APP_CALCULATOR));
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 5e1d8a5..6453f79 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -482,8 +482,6 @@
     <dimen name="split_instructions_bottom_margin_phone_landscape">24dp</dimen>
     <dimen name="split_instructions_bottom_margin_phone_portrait">60dp</dimen>
     <dimen name="split_instructions_start_margin_cancel">8dp</dimen>
-    <dimen name="split_divider_handle_region_width">96dp</dimen>
-    <dimen name="split_divider_handle_region_height">48dp</dimen>
 
     <dimen name="focus_outline_radius">16dp</dimen>
     <dimen name="focus_inner_outline_radius">14dp</dimen>
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 7e9e864..ee72c22 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -86,7 +86,7 @@
 
 public class CellLayout extends ViewGroup {
     private static final String TAG = "CellLayout";
-    private static final boolean LOGD = false;
+    private static final boolean LOGD = true;
 
     /** The color of the "leave-behind" shape when a folder is opened from Hotseat. */
     private static final int FOLDER_LEAVE_BEHIND_COLOR = Color.argb(160, 245, 245, 245);
@@ -166,6 +166,7 @@
     private final int[] mDragCellSpan = new int[2];
 
     private boolean mDragging = false;
+    public boolean mHasOnLayoutBeenCalled = false;
 
     private final TimeInterpolator mEaseOutInterpolator;
     protected final ShortcutAndWidgetContainer mShortcutsAndWidgets;
@@ -1009,6 +1010,7 @@
 
     @Override
     protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        mHasOnLayoutBeenCalled = true; // b/349929393 - is the required call to onLayout not done?
         int left = getPaddingLeft();
         left += (int) Math.ceil(getUnusedHorizontalSpace() / 2f);
         int right = r - l - getPaddingRight();
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index fac372b..9f122c1 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2701,6 +2701,20 @@
         writer.println(prefix + "\tmAppWidgetHolder.isListening: "
                 + mAppWidgetHolder.isListening());
 
+        // b/349929393
+        // The only way to reproduce this bug is to ensure that onLayout never gets called. This
+        // theoretically is impossible, so these logs are being added to test if that actually is
+        // what is happening.
+        writer.println(prefix + "\tmWorkspace.mHasOnLayoutBeenCalled="
+                + mWorkspace.mHasOnLayoutBeenCalled);
+        for (int i = 0; i < mWorkspace.getPageCount(); i++) {
+            CellLayout cellLayout = (CellLayout) mWorkspace.getPageAt(i);
+            writer.println(prefix + "\tcellLayout." + i + ".mHasOnLayoutBeenCalled="
+                    + cellLayout.mHasOnLayoutBeenCalled);
+            writer.println(prefix + "\tshortcutAndWidgetContainer." + i + ".mHasOnLayoutBeenCalled="
+                    + cellLayout.getShortcutsAndWidgets().mHasOnLayoutBeenCalled);
+        }
+
         // Extra logging for general debugging
         mDragLayer.dump(prefix, writer);
         mStateManager.dump(prefix, writer);
diff --git a/src/com/android/launcher3/ShortcutAndWidgetContainer.java b/src/com/android/launcher3/ShortcutAndWidgetContainer.java
index d2c3c78..a8733f2 100644
--- a/src/com/android/launcher3/ShortcutAndWidgetContainer.java
+++ b/src/com/android/launcher3/ShortcutAndWidgetContainer.java
@@ -64,6 +64,7 @@
 
     private final ActivityContext mActivity;
     private boolean mInvertIfRtl = false;
+    public boolean mHasOnLayoutBeenCalled = false;
 
     @Nullable
     private TranslationProvider mTranslationProvider = null;
@@ -201,6 +202,7 @@
     @Override
     protected void onLayout(boolean changed, int l, int t, int r, int b) {
         Trace.beginSection("ShortcutAndWidgetConteiner#onLayout");
+        mHasOnLayoutBeenCalled = true; // b/349929393 - is the required call to onLayout not done?
         int count = getChildCount();
         for (int i = 0; i < count; i++) {
             final View child = getChildAt(i);
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 2995e8a..255260e 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -235,6 +235,7 @@
     boolean mChildrenLayersEnabled = true;
 
     private boolean mStripScreensOnPageStopMoving = false;
+    public boolean mHasOnLayoutBeenCalled = false;
 
     private boolean mWorkspaceFadeInAdjacentScreens;
 
@@ -1445,6 +1446,7 @@
 
     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+        mHasOnLayoutBeenCalled = true; // b/349929393 - is the required call to onLayout not done?
         if (mUnlockWallpaperFromDefaultPageOnLayout) {
             mWallpaperOffset.setLockToDefaultPage(false);
             mUnlockWallpaperFromDefaultPageOnLayout = false;
diff --git a/src/com/android/launcher3/testing/TestInformationHandler.java b/src/com/android/launcher3/testing/TestInformationHandler.java
index db2a6e0..6d9b891 100644
--- a/src/com/android/launcher3/testing/TestInformationHandler.java
+++ b/src/com/android/launcher3/testing/TestInformationHandler.java
@@ -501,7 +501,7 @@
     /**
      * Returns the result by getting a generic property on UI thread
      */
-    private static <S, T> Bundle getUIProperty(
+    protected static <S, T> Bundle getUIProperty(
             BundleSetter<T> bundleSetter, Function<S, T> provider, Supplier<S> targetSupplier) {
         return getFromExecutorSync(MAIN_EXECUTOR, () -> {
             S target = targetSupplier.get();
diff --git a/src/com/android/launcher3/util/SplitConfigurationOptions.java b/src/com/android/launcher3/util/SplitConfigurationOptions.java
index 837d7bc..f457e4e 100644
--- a/src/com/android/launcher3/util/SplitConfigurationOptions.java
+++ b/src/com/android/launcher3/util/SplitConfigurationOptions.java
@@ -211,7 +211,7 @@
         private Drawable drawable;
         public final Intent intent;
         public final SplitPositionOption position;
-        public final ItemInfo itemInfo;
+        private ItemInfo itemInfo;
         public final StatsLogManager.EventEnum splitEvent;
         /** Represents the taskId of the first app to start in split screen */
         public int alreadyRunningTaskId = INVALID_TASK_ID;
@@ -239,5 +239,9 @@
         public View getView() {
             return view;
         }
+
+        public ItemInfo getItemInfo() {
+            return itemInfo;
+        }
     }
 }
diff --git a/tests/multivalentTests/shared/com/android/launcher3/testing/shared/TestProtocol.java b/tests/multivalentTests/shared/com/android/launcher3/testing/shared/TestProtocol.java
index 3f4a73a..a20b0f1 100644
--- a/tests/multivalentTests/shared/com/android/launcher3/testing/shared/TestProtocol.java
+++ b/tests/multivalentTests/shared/com/android/launcher3/testing/shared/TestProtocol.java
@@ -148,10 +148,8 @@
 
     public static final String REQUEST_HOTSEAT_CELL_CENTER = "hotseat-cell-center";
 
-    public static final String REQUEST_GET_FOCUSED_TASK_HEIGHT_FOR_TABLET =
-            "get-focused-task-height-for-tablet";
-    public static final String REQUEST_GET_GRID_TASK_SIZE_RECT_FOR_TABLET =
-            "get-grid-task-size-rect-for-tablet";
+    public static final String REQUEST_GET_OVERVIEW_TASK_SIZE = "get-overivew-task-size";
+    public static final String REQUEST_GET_OVERVIEW_GRID_TASK_SIZE = "get-overivew-grid-task-size";
     public static final String REQUEST_GET_OVERVIEW_PAGE_SPACING = "get-overview-page-spacing";
     public static final String REQUEST_GET_OVERVIEW_CURRENT_PAGE_INDEX =
             "get-overview-current-page-index";
@@ -173,6 +171,7 @@
     public static final String TEST_DRAG_APP_ICON_TO_MULTIPLE_WORKSPACES_FAILURE = "b/326908466";
     public static final String WIDGET_CONFIG_NULL_EXTRA_INTENT = "b/324419890";
     public static final String OVERVIEW_SELECT_TOOLTIP_MISALIGNED = "b/332485341";
+    public static final String OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH = "b/336660988";
     public static final String REQUEST_FLAG_ENABLE_GRID_ONLY_OVERVIEW = "enable-grid-only-overview";
     public static final String REQUEST_FLAG_ENABLE_APP_PAIRS = "enable-app-pairs";
 
diff --git a/tests/tapl/com/android/launcher3/tapl/BaseOverview.java b/tests/tapl/com/android/launcher3/tapl/BaseOverview.java
index e71b49f..ac145b7 100644
--- a/tests/tapl/com/android/launcher3/tapl/BaseOverview.java
+++ b/tests/tapl/com/android/launcher3/tapl/BaseOverview.java
@@ -23,6 +23,8 @@
 import static com.android.launcher3.tapl.OverviewTask.TASK_START_EVENT;
 import static com.android.launcher3.tapl.TestHelpers.getOverviewPackageName;
 import static com.android.launcher3.testing.shared.TestProtocol.NORMAL_STATE_ORDINAL;
+import static com.android.launcher3.testing.shared.TestProtocol.OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH;
+import static com.android.launcher3.testing.shared.TestProtocol.testLogD;
 
 import android.graphics.Rect;
 import android.util.Log;
@@ -278,7 +280,7 @@
                     if (mLauncher.isTablet()) {
                         mLauncher.assertTrue("current task is not grid height",
                                 getCurrentTask().getVisibleHeight() == mLauncher
-                                        .getGridTaskRectForTablet().height());
+                                        .getOverviewGridTaskSize().height());
                     }
                     mLauncher.assertTrue("Current task not scrolled off screen",
                             !getCurrentTask().equals(task));
@@ -354,7 +356,7 @@
         final List<UiObject2> taskViews = getTasks();
         mLauncher.assertNotEquals("Unable to find a task", 0, taskViews.size());
 
-        final int gridTaskWidth = mLauncher.getGridTaskRectForTablet().width();
+        final int gridTaskWidth = mLauncher.getOverviewGridTaskSize().width();
 
         return taskViews.stream().filter(t -> t.getVisibleBounds().width() == gridTaskWidth).map(
                 t -> new OverviewTask(mLauncher, t, this)).collect(Collectors.toList());
@@ -529,13 +531,17 @@
             throw new IllegalStateException("Must be run on tablet device.");
         }
         final List<UiObject2> taskViews = getTasks();
-        if (taskViews.size() == 0) {
+        if (taskViews.isEmpty()) {
             return null;
         }
-        int focusedTaskHeight = mLauncher.getFocusedTaskHeightForTablet();
+        Rect focusTaskSize = mLauncher.getOverviewTaskSize();
+        testLogD(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH, "focusTaskSize: " + focusTaskSize);
+        int focusedTaskHeight = focusTaskSize.height();
         for (UiObject2 task : taskViews) {
             OverviewTask overviewTask = new OverviewTask(mLauncher, task, this);
 
+            testLogD(OVERVIEW_FOCUS_TASK_HEIGHT_MISMATCH,
+                    "overviewTask.getVisibleHeight(): " + overviewTask.getVisibleHeight());
             if (overviewTask.getVisibleHeight() == focusedTaskHeight) {
                 return overviewTask;
             }
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index a874062..d3c423e 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -428,14 +428,14 @@
                 .getInt(TestProtocol.TEST_INFO_RESPONSE_FIELD);
     }
 
-    int getFocusedTaskHeightForTablet() {
-        return getTestInfo(TestProtocol.REQUEST_GET_FOCUSED_TASK_HEIGHT_FOR_TABLET).getInt(
-                TestProtocol.TEST_INFO_RESPONSE_FIELD);
+    Rect getOverviewTaskSize() {
+        return getTestInfo(TestProtocol.REQUEST_GET_OVERVIEW_TASK_SIZE)
+                .getParcelable(TestProtocol.TEST_INFO_RESPONSE_FIELD, Rect.class);
     }
 
-    Rect getGridTaskRectForTablet() {
-        return ((Rect) getTestInfo(TestProtocol.REQUEST_GET_GRID_TASK_SIZE_RECT_FOR_TABLET)
-                .getParcelable(TestProtocol.TEST_INFO_RESPONSE_FIELD));
+    Rect getOverviewGridTaskSize() {
+        return getTestInfo(TestProtocol.REQUEST_GET_OVERVIEW_GRID_TASK_SIZE)
+                .getParcelable(TestProtocol.TEST_INFO_RESPONSE_FIELD, Rect.class);
     }
 
     int getOverviewPageSpacing() {
diff --git a/tests/tapl/com/android/launcher3/tapl/OverviewTask.java b/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
index 7a8ab49..ab48a21 100644
--- a/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
+++ b/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
@@ -156,8 +156,8 @@
                 return;
             }
 
-            boolean taskWasFocused = mLauncher.isTablet() && getVisibleHeight() == mLauncher
-                    .getFocusedTaskHeightForTablet();
+            boolean taskWasFocused = mLauncher.isTablet()
+                    && getVisibleHeight() == mLauncher.getOverviewTaskSize().height();
             List<Integer> originalTasksCenterX =
                     getCurrentTasksCenterXList().stream().sorted().toList();
             boolean isClearAllVisibleBeforeDismiss = mOverview.isClearAllVisible();