diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index c29e60e..59bf8d5 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -158,6 +158,11 @@
                 shouldDelayLauncherStateAnim);
     }
 
+    @Override
+    public void stashHotseat(boolean stash) {
+        mTaskbarLauncherStateController.stashHotseat(stash);
+    }
+
     /**
      * Adds the Launcher resume animator to the given animator set.
      *
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
index ab3b44e..84c834b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarLauncherStateController.java
@@ -17,9 +17,12 @@
 
 import static com.android.app.animation.Interpolators.EMPHASIZED;
 import static com.android.launcher3.LauncherState.HOTSEAT_ICONS;
+import static com.android.launcher3.Hotseat.ALPHA_CHANNEL_TASKBAR_ALIGNMENT;
+import static com.android.launcher3.Hotseat.ALPHA_CHANNEL_TASKBAR_STASH;
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_APP;
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_OVERVIEW;
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_STASHED_LAUNCHER_STATE;
+import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_FOR_BUBBLES;
 import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_HOME;
 import static com.android.launcher3.util.FlagDebugUtils.appendFlag;
 import static com.android.launcher3.util.FlagDebugUtils.formatFlagChange;
@@ -41,6 +44,7 @@
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Hotseat.HotseatQsbAlphaId;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.QuickstepTransitionManager;
 import com.android.launcher3.Utilities;
@@ -145,7 +149,7 @@
     private AnimatedFloat mTaskbarBackgroundAlpha;
     private AnimatedFloat mTaskbarAlpha;
     private AnimatedFloat mTaskbarCornerRoundness;
-    private MultiProperty mIconAlphaForHome;
+    private MultiProperty mTaskbarAlphaForHome;
     private QuickstepLauncher mLauncher;
 
     private boolean mIsDestroyed = false;
@@ -175,11 +179,11 @@
                     if (mIsQsbInline && !dp.isQsbInline) {
                         // We only modify QSB alpha if isQsbInline = true. If we switch to a DP
                         // where isQsbInline = false, then we need to reset the alpha.
-                        mLauncher.getHotseat().setQsbAlpha(1f);
+                        mLauncher.getHotseat().setQsbAlpha(1f, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                     }
                     mIsQsbInline = dp.isQsbInline;
                     TaskbarLauncherStateController.this.updateIconAlphaForHome(
-                            mIconAlphaForHome.getValue());
+                            mTaskbarAlphaForHome.getValue(), ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                 }
             };
 
@@ -242,7 +246,7 @@
                 .getTaskbarBackgroundAlpha();
         mTaskbarAlpha = mControllers.taskbarDragLayerController.getTaskbarAlpha();
         mTaskbarCornerRoundness = mControllers.getTaskbarCornerRoundness();
-        mIconAlphaForHome = mControllers.taskbarViewController
+        mTaskbarAlphaForHome = mControllers.taskbarViewController
                 .getTaskbarIconAlpha().get(ALPHA_INDEX_HOME);
 
         resetIconAlignment();
@@ -266,7 +270,7 @@
 
         mIconAlignment.finishAnimation();
 
-        mLauncher.getHotseat().setIconsAlpha(1f);
+        mLauncher.getHotseat().setIconsAlpha(1f, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
         mLauncher.getStateManager().removeStateListener(mStateListener);
 
         mCanSyncViews = !mControllers.taskbarActivityContext.isPhoneMode();
@@ -701,14 +705,17 @@
                 public void onAnimationEnd(Animator animation) {
                     if (isInStashedState && committed) {
                         // Reset hotseat alpha to default
-                        mLauncher.getHotseat().setIconsAlpha(1);
+                        mLauncher.getHotseat().setIconsAlpha(1, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                     }
                 }
 
                 @Override
                 public void onAnimationStart(Animator animation) {
-                    if (mLauncher.getHotseat().getIconsAlpha() > 0) {
-                        updateIconAlphaForHome(mLauncher.getHotseat().getIconsAlpha());
+                    float hotseatIconsAlpha = mLauncher.getHotseat()
+                            .getIconsAlpha(ALPHA_CHANNEL_TASKBAR_ALIGNMENT)
+                            .getValue();
+                    if (hotseatIconsAlpha > 0) {
+                        updateIconAlphaForHome(hotseatIconsAlpha, ALPHA_CHANNEL_TASKBAR_ALIGNMENT);
                     }
                 }
             });
@@ -737,6 +744,25 @@
         }
     }
 
+    protected void stashHotseat(boolean stash) {
+        TaskbarStashController stashController = mControllers.taskbarStashController;
+        stashController.updateStateForFlag(FLAG_STASHED_FOR_BUBBLES, stash);
+        Runnable swapHotseatWithTaskbar = new Runnable() {
+            @Override
+            public void run() {
+                updateIconAlphaForHome(stash ? 1 : 0, ALPHA_CHANNEL_TASKBAR_STASH);
+            }
+        };
+        if (stash) {
+            stashController.applyState();
+            // if we stashing the hotseat we need to immediately swap it with the animating taskbar
+            swapHotseatWithTaskbar.run();
+        } else {
+            // if we revert stashing make swap after taskbar animation is complete
+            stashController.applyState(/* postApplyAction = */ swapHotseatWithTaskbar);
+        }
+    }
+
     /**
      * Resets and updates the icon alignment.
      */
@@ -746,7 +772,7 @@
     }
 
     private void onIconAlignmentRatioChanged() {
-        float currentValue = mIconAlphaForHome.getValue();
+        float currentValue = mTaskbarAlphaForHome.getValue();
         boolean taskbarWillBeVisible = mIconAlignment.value < 1;
         boolean firstFrameVisChanged = (taskbarWillBeVisible && Float.compare(currentValue, 1) != 0)
                 || (!taskbarWillBeVisible && Float.compare(currentValue, 0) != 0);
@@ -754,8 +780,10 @@
         mControllers.taskbarViewController.setLauncherIconAlignment(
                 mIconAlignment.value, mLauncher.getDeviceProfile());
         mControllers.navbarButtonsViewController.updateTaskbarAlignment(mIconAlignment.value);
-        // Switch taskbar and hotseat in last frame
-        updateIconAlphaForHome(taskbarWillBeVisible ? 1 : 0);
+        // Switch taskbar and hotseat in last frame and if taskbar is not hidden for bubbles
+        boolean isHiddenForBubbles = mControllers.taskbarStashController.isHiddenForBubbles();
+        updateIconAlphaForHome(taskbarWillBeVisible ? 1 : 0, ALPHA_CHANNEL_TASKBAR_ALIGNMENT,
+                /* updateTaskbarAlpha = */ !isHiddenForBubbles);
 
         // Sync the first frame where we swap taskbar and hotseat.
         if (firstFrameVisChanged && mCanSyncViews && !Utilities.isRunningInTestHarness()) {
@@ -765,12 +793,20 @@
         }
     }
 
-    private void updateIconAlphaForHome(float alpha) {
+    private void updateIconAlphaForHome(float taskbarAlpha, @HotseatQsbAlphaId int alphaChannel) {
+        updateIconAlphaForHome(taskbarAlpha, alphaChannel, /* updateTaskbarAlpha = */ true);
+    }
+
+    private void updateIconAlphaForHome(float taskbarAlpha,
+            @HotseatQsbAlphaId int alphaChannel,
+            boolean updateTaskbarAlpha) {
         if (mIsDestroyed) {
             return;
         }
-        mIconAlphaForHome.setValue(alpha);
-        boolean hotseatVisible = alpha == 0
+        if (updateTaskbarAlpha) {
+            mTaskbarAlphaForHome.setValue(taskbarAlpha);
+        }
+        boolean hotseatVisible = taskbarAlpha == 0
                 || mControllers.taskbarActivityContext.isPhoneMode()
                 || (!mControllers.uiController.isHotseatIconOnTopWhenAligned()
                 && mIconAlignment.value > 0);
@@ -778,9 +814,10 @@
          * Hide Launcher Hotseat icons when Taskbar icons have opacity. Both icon sets
          * should not be visible at the same time.
          */
-        mLauncher.getHotseat().setIconsAlpha(hotseatVisible ? 1 : 0);
+        float targetAlpha = hotseatVisible ? 1 : 0;
+        mLauncher.getHotseat().setIconsAlpha(targetAlpha, alphaChannel);
         if (mIsQsbInline) {
-            mLauncher.getHotseat().setQsbAlpha(hotseatVisible ? 1 : 0);
+            mLauncher.getHotseat().setQsbAlpha(targetAlpha, alphaChannel);
         }
     }
 
@@ -868,7 +905,7 @@
         pw.println(String.format(
                 "%s\tmTaskbarBackgroundAlpha=%.2f", prefix, mTaskbarBackgroundAlpha.value));
         pw.println(String.format(
-                "%s\tmIconAlphaForHome=%.2f", prefix, mIconAlphaForHome.getValue()));
+                "%s\tmTaskbarAlphaForHome=%.2f", prefix, mTaskbarAlphaForHome.getValue()));
         pw.println(String.format("%s\tmPrevState=%s", prefix,
                 mPrevState == null ? null : getStateString(mPrevState)));
         pw.println(String.format("%s\tmState=%s", prefix, getStateString(mState)));
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
index 2370dfd..751a42a 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarScrimViewController.java
@@ -115,7 +115,8 @@
         return bubblesExpanded && !mControllers.navbarButtonsViewController.isImeVisible()
                 && !isShadeVisible
                 && !mControllers.taskbarStashController.isStashed()
-                && (mTaskbarVisible || showScrimForBubbles);
+                && (mTaskbarVisible || showScrimForBubbles)
+                && !mControllers.taskbarStashController.isHiddenForBubbles();
     }
 
     private float getScrimAlpha() {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index 2c2f65d..1f7b44f 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -101,6 +101,7 @@
     public static final int FLAG_IN_OVERVIEW = 1 << 11; // launcher is in overview
     // An internal no-op flag to determine whether we should delay the taskbar background animation
     private static final int FLAG_DELAY_TASKBAR_BG_TAG = 1 << 12;
+    public static final int FLAG_STASHED_FOR_BUBBLES = 1 << 13; // show handle for stashed hotseat
 
     // If any of these flags are enabled, isInApp should return true.
     private static final int FLAGS_IN_APP = FLAG_IN_APP | FLAG_IN_SETUP;
@@ -122,7 +123,8 @@
 
     // If any of these flags are enabled, the taskbar must be stashed.
     private static final int FLAGS_FORCE_STASHED = FLAG_STASHED_SYSUI | FLAG_STASHED_DEVICE_LOCKED
-            | FLAG_STASHED_IN_TASKBAR_ALL_APPS | FLAG_STASHED_SMALL_SCREEN;
+            | FLAG_STASHED_IN_TASKBAR_ALL_APPS | FLAG_STASHED_SMALL_SCREEN
+            | FLAG_STASHED_FOR_BUBBLES;
 
     /**
      * How long to stash/unstash when manually invoked via long press.
@@ -395,6 +397,11 @@
         return mIsStashed;
     }
 
+    /** Sets the hotseat stashed. */
+    public void stashHotseat(boolean stash) {
+        mControllers.uiController.stashHotseat(stash);
+    }
+
     /**
      * Returns whether the taskbar should be stashed in apps (e.g. user long pressed to stash).
      */
@@ -434,6 +441,11 @@
         return hasAnyFlag(FLAG_IN_OVERVIEW);
     }
 
+    /** Returns whether taskbar is hidden for bubbles. */
+    public boolean isHiddenForBubbles() {
+        return hasAnyFlag(FLAG_STASHED_FOR_BUBBLES);
+    }
+
     /**
      * Returns the height that taskbar will be touchable.
      */
@@ -995,13 +1007,29 @@
     }
 
     public void applyState() {
-        applyState(hasAnyFlag(FLAG_IN_SETUP) ? 0 : TASKBAR_STASH_DURATION);
+        applyState(/* postApplyAction = */ null);
+    }
+
+    /** Applies state and performs action after state is applied. */
+    public void applyState(@Nullable Runnable postApplyAction) {
+        applyState(hasAnyFlag(FLAG_IN_SETUP) ? 0 : TASKBAR_STASH_DURATION, postApplyAction);
     }
 
     public void applyState(long duration) {
+        applyState(duration, /* postApplyAction = */ null);
+    }
+
+    private void applyState(long duration, @Nullable Runnable postApplyAction) {
         Animator animator = createApplyStateAnimator(duration);
         if (animator != null) {
+            if (postApplyAction != null) {
+                // performs action on animation end
+                animator.addListener(AnimatorListeners.forEndCallback(postApplyAction));
+            }
             animator.start();
+        } else if (postApplyAction != null) {
+            // animator was not created, just execute the action
+            postApplyAction.run();
         }
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
index 6b1173a..c047216 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarUIController.java
@@ -428,4 +428,8 @@
     public void setSkipLauncherVisibilityChange(boolean skip) {
         mSkipLauncherVisibilityChange = skip;
     }
+
+    /** Sets whether the hotseat is stashed */
+    public void stashHotseat(boolean stash) {
+    }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
index ed08de5..4176292 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java
@@ -440,7 +440,7 @@
             if (hidden) {
                 mBarView.setAlpha(0);
                 mBarView.setExpanded(false);
-                updatePersistentTaskbar(/* isBubbleBarExpanded = */ false);
+                adjustTaskbarAndHotseatToBubbleBarState(/* isBubbleBarExpanded = */ false);
             }
             mActivity.bubbleBarVisibilityChanged(!hidden);
         }
@@ -735,7 +735,7 @@
     public void setExpanded(boolean isExpanded) {
         if (isExpanded != mBarView.isExpanded()) {
             mBarView.setExpanded(isExpanded);
-            updatePersistentTaskbar(isExpanded);
+            adjustTaskbarAndHotseatToBubbleBarState(isExpanded);
             if (!isExpanded) {
                 mSystemUiProxy.collapseBubbles();
             } else {
@@ -746,13 +746,20 @@
         }
     }
 
-    private void updatePersistentTaskbar(boolean isBubbleBarExpanded) {
-        if (mBubbleStashController.isTransientTaskBar()) return;
-        boolean hideTaskbar = isBubbleBarExpanded && isIntersectingTaskbar();
-        mTaskbarViewPropertiesProvider
-                .getIconsAlpha()
-                .animateToValue(hideTaskbar ? 0 : 1)
-                .start();
+    /**
+     * Hides the persistent taskbar if it is going to intersect with the expanded bubble bar if in
+     * app or overview. Set the hotseat stashed state if on launcher home screen.
+     */
+    private void adjustTaskbarAndHotseatToBubbleBarState(boolean isBubbleBarExpanded) {
+        if (mBubbleStashController.isBubblesShowingOnHome()) {
+            mTaskbarStashController.stashHotseat(isBubbleBarExpanded);
+        } else if (!mBubbleStashController.isTransientTaskBar()) {
+            boolean hideTaskbar = isBubbleBarExpanded && isIntersectingTaskbar();
+            mTaskbarViewPropertiesProvider
+                    .getIconsAlpha()
+                    .animateToValue(hideTaskbar ? 0 : 1)
+                    .start();
+        }
     }
 
     /** Return {@code true} if expanded bubble bar would intersect the taskbar. */
@@ -871,6 +878,11 @@
         mBoundsChangeListener = listener;
     }
 
+    /** Called when the controller is destroyed. */
+    public void onDestroy() {
+        adjustTaskbarAndHotseatToBubbleBarState(/*isBubbleBarExpanded = */false);
+    }
+
     /**
      * Create an animator for showing or hiding bubbles when stashed state changes
      *
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java
index 12df6f0..a66df4c 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleControllers.java
@@ -131,6 +131,7 @@
     public void onDestroy() {
         bubbleStashedHandleViewController.ifPresent(BubbleStashedHandleViewController::onDestroy);
         bubbleBarController.onDestroy();
+        bubbleBarViewController.onDestroy();
     }
 
     /** Dumps bubble controllers state. */
diff --git a/quickstep/src/com/android/quickstep/util/RecentsViewUtils.kt b/quickstep/src/com/android/quickstep/util/RecentsViewUtils.kt
index 595aa00..be1af64 100644
--- a/quickstep/src/com/android/quickstep/util/RecentsViewUtils.kt
+++ b/quickstep/src/com/android/quickstep/util/RecentsViewUtils.kt
@@ -28,9 +28,17 @@
  * and extracted functions from RecentsView to facilitate the implementation of unit tests.
  */
 class RecentsViewUtils {
+    /** Takes a screenshot of all [taskView] and return map of taskId to the screenshot */
+    fun screenshotTasks(
+        taskView: TaskView,
+        recentsAnimationController: RecentsAnimationController,
+    ): Map<Int, ThumbnailData> =
+        taskView.taskContainers.associate {
+            it.task.key.id to recentsAnimationController.screenshotTask(it.task.key.id)
+        }
 
     /**
-     * Sort task groups to move desktop tasks to the end of the list.
+     * Sorts task groups to move desktop tasks to the end of the list.
      *
      * @param tasks List of group tasks to be sorted.
      * @return Sorted list of GroupTasks to be used in the RecentsView.
@@ -40,6 +48,7 @@
         return otherTasks + desktopTasks
     }
 
+    /** Returns the expected index of the focus task. */
     fun getFocusedTaskIndex(taskGroups: List<GroupTask>): Int {
         // The focused task index is placed after the desktop tasks views.
         return if (enableLargeDesktopWindowingTile()) {
@@ -49,12 +58,8 @@
         }
     }
 
-    /**
-     * Counts [TaskView]s that are [DesktopTaskView] instances.
-     *
-     * @param taskViews List of [TaskView]s
-     */
-    fun getDesktopTaskViewCount(taskViews: List<TaskView>): Int =
+    /** Counts [TaskView]s that are [DesktopTaskView] instances. */
+    fun getDesktopTaskViewCount(taskViews: Iterable<TaskView>): Int =
         taskViews.count { it is DesktopTaskView }
 
     /** Returns a list of all large TaskView Ids from [TaskView]s */
@@ -66,18 +71,64 @@
      *
      * @param taskViews List of [TaskView]s
      */
-    fun getFirstLargeTaskView(taskViews: List<TaskView>): TaskView? =
+    fun getFirstLargeTaskView(taskViews: Iterable<TaskView>): TaskView? =
         taskViews.firstOrNull { it.isLargeTile }
 
-    fun screenshotTasks(
-        taskView: TaskView,
-        recentsAnimationController: RecentsAnimationController,
-    ): Map<Int, ThumbnailData> =
-        taskView.taskContainers.associate {
-            it.task.key.id to recentsAnimationController.screenshotTask(it.task.key.id)
+    /** Returns the last TaskView that should be displayed as a large tile. */
+    fun getLastLargeTaskView(taskViews: Iterable<TaskView>): TaskView? =
+        taskViews.lastOrNull { it.isLargeTile }
+
+    /** Returns the first [TaskView], with some tasks possibly hidden in the carousel. */
+    fun getFirstTaskViewInCarousel(
+        nonRunningTaskCategoryHidden: Boolean,
+        taskViews: Iterable<TaskView>,
+        runningTaskView: TaskView?,
+    ): TaskView? =
+        taskViews.firstOrNull {
+            it.isVisibleInCarousel(runningTaskView, nonRunningTaskCategoryHidden)
+        }
+
+    /** Returns the last [TaskView], with some tasks possibly hidden in the carousel. */
+    fun getLastTaskViewInCarousel(
+        nonRunningTaskCategoryHidden: Boolean,
+        taskViews: Iterable<TaskView>,
+        runningTaskView: TaskView?,
+    ): TaskView? =
+        taskViews.lastOrNull {
+            it.isVisibleInCarousel(runningTaskView, nonRunningTaskCategoryHidden)
         }
 
     /** Returns the current list of [TaskView] children. */
-    fun getTaskViews(taskViewCount: Int, requireTaskViewAt: (Int) -> TaskView): List<TaskView> =
+    fun getTaskViews(taskViewCount: Int, requireTaskViewAt: (Int) -> TaskView): Iterable<TaskView> =
         (0 until taskViewCount).map(requireTaskViewAt)
+
+    /** Apply attachAlpha to all [TaskView] accordingly to different conditions. */
+    fun applyAttachAlpha(
+        taskViews: Iterable<TaskView>,
+        runningTaskView: TaskView?,
+        runningTaskTileHidden: Boolean,
+        nonRunningTaskCategoryHidden: Boolean,
+    ) {
+        taskViews.forEach { taskView ->
+            val isVisible =
+                if (taskView == runningTaskView) !runningTaskTileHidden
+                else taskView.isVisibleInCarousel(runningTaskView, nonRunningTaskCategoryHidden)
+            taskView.attachAlpha = if (isVisible) 1f else 0f
+        }
+    }
+
+    private fun TaskView.isVisibleInCarousel(
+        runningTaskView: TaskView?,
+        nonRunningTaskCategoryHidden: Boolean,
+    ): Boolean =
+        if (!nonRunningTaskCategoryHidden) true
+        else if (runningTaskView == null) true else getCategory() == runningTaskView.getCategory()
+
+    private fun TaskView.getCategory(): TaskViewCategory =
+        if (this is DesktopTaskView) TaskViewCategory.DESKTOP else TaskViewCategory.FULL_SCREEN
+
+    private enum class TaskViewCategory {
+        FULL_SCREEN,
+        DESKTOP,
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index e37e036..bb46a2c 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -681,6 +681,7 @@
     protected int mRunningTaskViewId = -1;
     private int mTaskViewIdCount;
     protected boolean mRunningTaskTileHidden;
+    private boolean mNonRunningTaskCategoryHidden;
     @Nullable
     private Task[] mTmpRunningTasks;
     protected int mFocusedTaskViewId = INVALID_TASK_ID;
@@ -2094,14 +2095,10 @@
             simulator.fullScreenProgress.value = 0;
             simulator.recentsViewScale.value = 1;
         });
-        // Similar to setRunningTaskHidden below, reapply the state before runningTaskView is
-        // null.
-        if (!mRunningTaskShowScreenshot) {
-            setRunningTaskViewShowScreenshot(mRunningTaskShowScreenshot);
-        }
-        if (mRunningTaskTileHidden) {
-            setRunningTaskHidden(mRunningTaskTileHidden);
-        }
+        // Reapply runningTask related attributes as they might have been reset by
+        // resetViewTransforms().
+        setRunningTaskViewShowScreenshot(mRunningTaskShowScreenshot);
+        applyAttachAlpha();
 
         updateCurveProperties();
         // Update the set of visible task's data
@@ -2650,10 +2647,6 @@
         return getTaskViewFromTaskViewId(mFocusedTaskViewId);
     }
 
-    private @Nullable TaskView getFirstLargeTaskView() {
-        return mUtils.getFirstLargeTaskView(getTaskViews());
-    }
-
     @Nullable
     private TaskView getTaskViewFromTaskViewId(int taskViewId) {
         if (taskViewId == -1) {
@@ -2749,7 +2742,10 @@
         showCurrentTask(mActiveGestureRunningTasks);
         setEnableFreeScroll(false);
         setEnableDrawingLiveTile(false);
-        setRunningTaskHidden(!shouldUpdateRunningTaskAlpha());
+        setRunningTaskHidden(true);
+        if (enableLargeDesktopWindowingTile()) {
+            setNonRunningTaskCategoryHidden(true);
+        }
         setTaskIconScaledDown(true);
     }
 
@@ -2888,6 +2884,9 @@
         setEnableDrawingLiveTile(mCurrentGestureEndTarget == GestureState.GestureEndTarget.RECENTS);
         Log.d(TAG, "onGestureAnimationEnd - mEnableDrawingLiveTile: " + mEnableDrawingLiveTile);
         setRunningTaskHidden(false);
+        if (enableLargeDesktopWindowingTile()) {
+            setNonRunningTaskCategoryHidden(false);
+        }
         animateUpTaskIconScale();
         animateActionsViewIn();
 
@@ -3043,13 +3042,27 @@
         if (runningTask == null) {
             return;
         }
-        runningTask.setStableAlpha(isHidden ? 0 : mContentAlpha);
+        applyAttachAlpha();
         if (!isHidden) {
             AccessibilityManagerCompat.sendCustomAccessibilityEvent(
                     runningTask, AccessibilityEvent.TYPE_VIEW_FOCUSED, null);
         }
     }
 
+    /**
+     * Hides the tasks that has a different category (Fullscreen/Desktop) from the running task.
+     */
+    public void setNonRunningTaskCategoryHidden(boolean isHidden) {
+        mNonRunningTaskCategoryHidden = isHidden;
+        updateMinAndMaxScrollX();
+        applyAttachAlpha();
+    }
+
+    private void applyAttachAlpha() {
+        mUtils.applyAttachAlpha(getTaskViews(), getRunningTaskView(), mRunningTaskTileHidden,
+                mNonRunningTaskCategoryHidden);
+    }
+
     private void setRunningTaskViewShowScreenshot(boolean showScreenshot) {
         setRunningTaskViewShowScreenshot(showScreenshot, /*updatedThumbnails=*/null);
     }
@@ -4447,11 +4460,7 @@
         alpha = Utilities.boundToRange(alpha, 0, 1);
         mContentAlpha = alpha;
 
-        TaskView runningTaskView = getRunningTaskView();
         for (TaskView taskView : getTaskViews()) {
-            if (runningTaskView != null && mRunningTaskTileHidden && taskView == runningTaskView) {
-                continue;
-            }
             taskView.setStableAlpha(alpha);
         }
         mClearAllButton.setContentAlpha(mContentAlpha);
@@ -4564,7 +4573,7 @@
     /**
      * Returns the current list of [TaskView] children.
      */
-    private List<TaskView> getTaskViews() {
+    private Iterable<TaskView> getTaskViews() {
         return mUtils.getTaskViews(getTaskViewCount(), this::requireTaskViewAt);
     }
 
@@ -5794,26 +5803,42 @@
     }
 
     private int getFirstViewIndex() {
-        TaskView firstTaskView = mShowAsGridLastOnLayout ? getFirstLargeTaskView() : null;
-        return firstTaskView != null ? indexOfChild(firstTaskView) : 0;
+        final TaskView firstView;
+        if (mShowAsGridLastOnLayout) {
+            // For grid Overivew, it always start if a large tile (focused task or desktop task) if
+            // they exist, otherwise it start with the first task.
+            TaskView firstLargeTaskView = mUtils.getFirstLargeTaskView(getTaskViews());
+            if (firstLargeTaskView != null) {
+                firstView = firstLargeTaskView;
+            } else {
+                firstView = getTaskViewAt(0);
+            }
+        } else {
+            firstView = mUtils.getFirstTaskViewInCarousel(mNonRunningTaskCategoryHidden,
+                    getTaskViews(), getRunningTaskView());
+        }
+        return indexOfChild(firstView);
     }
 
     private int getLastViewIndex() {
+        final View lastView;
         if (!mDisallowScrollToClearAll) {
-            return indexOfChild(mClearAllButton);
+            // When ClearAllButton is present, it always end with ClearAllButton.
+            lastView = mClearAllButton;
+        } else if (mShowAsGridLastOnLayout) {
+            // When ClearAllButton is absent, for the grid Overview, it always end with a grid task
+            // if they exist, otherwise it ends with a large tile (focused task or desktop task).
+            TaskView lastGridTaskView = getLastGridTaskView();
+            if (lastGridTaskView != null) {
+                lastView = lastGridTaskView;
+            } else {
+                lastView = mUtils.getLastLargeTaskView(getTaskViews());
+            }
+        } else {
+            lastView = mUtils.getLastTaskViewInCarousel(mNonRunningTaskCategoryHidden,
+                    getTaskViews(), getRunningTaskView());
         }
-
-        if (!mShowAsGridLastOnLayout) {
-            return getTaskViewCount() - 1;
-        }
-
-        TaskView lastGridTaskView = getLastGridTaskView();
-        if (lastGridTaskView != null) {
-            return indexOfChild(lastGridTaskView);
-        }
-
-        // Returns focus task if there are no grid tasks.
-        return indexOfChild(getFirstLargeTaskView());
+        return indexOfChild(lastView);
     }
 
     /**
diff --git a/quickstep/src/com/android/quickstep/views/TaskView.kt b/quickstep/src/com/android/quickstep/views/TaskView.kt
index 291ccef..2ed6ae6 100644
--- a/quickstep/src/com/android/quickstep/views/TaskView.kt
+++ b/quickstep/src/com/android/quickstep/views/TaskView.kt
@@ -82,7 +82,6 @@
 import com.android.quickstep.orientation.RecentsPagedOrientationHandler
 import com.android.quickstep.recents.di.RecentsDependencies
 import com.android.quickstep.recents.di.get
-import com.android.quickstep.task.thumbnail.TaskThumbnailView
 import com.android.quickstep.task.viewmodel.TaskViewModel
 import com.android.quickstep.util.ActiveGestureErrorDetector
 import com.android.quickstep.util.ActiveGestureLog
@@ -397,7 +396,7 @@
         }
         get() = taskViewAlpha.get(ALPHA_INDEX_STABLE).value
 
-    protected var attachAlpha
+    var attachAlpha
         set(value) {
             taskViewAlpha.get(ALPHA_INDEX_ATTACH).value = value
         }
@@ -606,6 +605,7 @@
 
     override fun onRecycle() {
         resetPersistentViewTransforms()
+        attachAlpha = 1f
         // Clear any references to the thumbnail (it will be re-read either from the cache or the
         // system on next bind)
         if (!enableRefactorTaskThumbnail()) {
@@ -1587,10 +1587,7 @@
         resetViewTransforms()
     }
 
-    fun getTaskContainerForTaskThumbnailView(taskThumbnailView: TaskThumbnailView): TaskContainer? =
-        taskContainers.firstOrNull { it.thumbnailView == taskThumbnailView }
-
-    open fun resetViewTransforms() {
+    fun resetViewTransforms() {
         // fullscreenTranslation and accumulatedTranslation should not be reset, as
         // resetViewTransforms is called during QuickSwitch scrolling.
         dismissTranslationX = 0f
@@ -1606,7 +1603,6 @@
         }
         dismissScale = 1f
         translationZ = 0f
-        attachAlpha = 1f
         setIconScaleAndDim(1f)
         setColorTint(0f, 0)
     }
diff --git a/quickstep/tests/src/com/android/quickstep/TaplPrivateSpaceTest.java b/quickstep/tests/src/com/android/quickstep/TaplPrivateSpaceTest.java
index 23a29f7..800fd4a 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplPrivateSpaceTest.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplPrivateSpaceTest.java
@@ -21,6 +21,7 @@
 
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeFalse;
 
 import android.util.Log;
 
@@ -117,7 +118,6 @@
     }
 
     @Test
-    @ScreenRecordRule.ScreenRecord // b/334946529
     public void testUserInstalledAppIsShownAboveDivider() throws IOException {
         // Ensure that the App is not installed in main user otherwise, it may not be found in
         // PS container.
@@ -142,7 +142,6 @@
     }
 
     @Test
-    @ScreenRecordRule.ScreenRecord // b/334946529
     public void testPrivateSpaceAppLongPressUninstallMenu() throws IOException {
         // Ensure that the App is not installed in main user otherwise, it may not be found in
         // PS container.
@@ -166,8 +165,9 @@
     }
 
     @Test
-    @ScreenRecordRule.ScreenRecord // b/334946529
+    @ScreenRecordRule.ScreenRecord // b/355466672
     public void testPrivateSpaceLockingBehaviour() throws IOException {
+        assumeFalse(mLauncher.isTablet()); // b/367258373
         // Scroll to the bottom of All Apps
         executeOnLauncher(launcher -> launcher.getAppsView().resetAndScrollToPrivateSpaceHeader());
         HomeAllApps homeAllApps = mLauncher.getAllApps();
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java b/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
index de2c506..113b8a4 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
@@ -577,7 +577,7 @@
     public void testExcludeFromRecents() throws Exception {
         startExcludeFromRecentsTestActivity();
         OverviewTask currentTask = getAndAssertLaunchedApp().switchToOverview().getCurrentTask();
-        // TODO(b/326565120): the expected content description shouldn't be null but for now there
+        // TODO(b/342627272): the expected content description shouldn't be null but for now there
         // is a bug that causes it to sometimes be for excludeForRecents tasks.
         assertTrue("Can't find ExcludeFromRecentsTestActivity after entering Overview from it",
                 currentTask.containsContentDescription("ExcludeFromRecents")
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index 0d4ebe0..024dde4 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -33,15 +33,34 @@
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
+import androidx.annotation.IntDef;
+
 import com.android.launcher3.util.HorizontalInsettableView;
+import com.android.launcher3.util.MultiPropertyFactory.MultiProperty;
 import com.android.launcher3.util.MultiTranslateDelegate;
+import com.android.launcher3.util.MultiValueAlpha;
 import com.android.launcher3.views.ActivityContext;
 
+import java.io.PrintWriter;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * View class that represents the bottom row of the home screen.
  */
 public class Hotseat extends CellLayout implements Insettable {
 
+    public static final int ALPHA_CHANNEL_TASKBAR_ALIGNMENT = 0;
+    public static final int ALPHA_CHANNEL_PREVIEW_RENDERER = 1;
+    public static final int ALPHA_CHANNEL_TASKBAR_STASH = 2;
+    public static final int ALPHA_CHANNEL_CHANNELS_COUNT = 3;
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @IntDef({ALPHA_CHANNEL_TASKBAR_ALIGNMENT, ALPHA_CHANNEL_PREVIEW_RENDERER,
+            ALPHA_CHANNEL_TASKBAR_STASH})
+    public @interface HotseatQsbAlphaId {
+    }
+
     // Ratio of empty space, qsb should take up to appear visually centered.
     public static final float QSB_CENTER_FACTOR = .325f;
     private static final int BUBBLE_BAR_ADJUSTMENT_ANIMATION_DURATION_MS = 250;
@@ -50,6 +69,8 @@
     private boolean mHasVerticalHotseat;
     private Workspace<?> mWorkspace;
     private boolean mSendTouchToWorkspace;
+    private final MultiValueAlpha mIconsAlphaChannels;
+    private final MultiValueAlpha mQsbAlphaChannels;
 
     private final View mQsb;
 
@@ -63,9 +84,11 @@
 
     public Hotseat(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
-
         mQsb = LayoutInflater.from(context).inflate(R.layout.search_container_hotseat, this, false);
         addView(mQsb);
+        mIconsAlphaChannels = new MultiValueAlpha(getShortcutsAndWidgets(),
+                ALPHA_CHANNEL_CHANNELS_COUNT);
+        mQsbAlphaChannels = new MultiValueAlpha(mQsb, ALPHA_CHANNEL_CHANNELS_COUNT);
     }
 
     /**
@@ -270,21 +293,27 @@
     }
 
     /**
-     * Sets the alpha value of just our ShortcutAndWidgetContainer.
+     * Sets the alpha value of the specified alpha channel of just our ShortcutAndWidgetContainer.
      */
-    public void setIconsAlpha(float alpha) {
-        getShortcutsAndWidgets().setAlpha(alpha);
+    public void setIconsAlpha(float alpha, @HotseatQsbAlphaId int channelId) {
+        getIconsAlpha(channelId).setValue(alpha);
     }
 
     /**
      * Sets the alpha value of just our QSB.
      */
-    public void setQsbAlpha(float alpha) {
-        mQsb.setAlpha(alpha);
+    public void setQsbAlpha(float alpha, @HotseatQsbAlphaId int channelId) {
+        getQsbAlpha(channelId).setValue(alpha);
     }
 
-    public float getIconsAlpha() {
-        return getShortcutsAndWidgets().getAlpha();
+    /** Returns the alpha channel for ShortcutAndWidgetContainer */
+    public MultiProperty getIconsAlpha(@HotseatQsbAlphaId int channelId) {
+        return mIconsAlphaChannels.get(channelId);
+    }
+
+    /** Returns the alpha channel for Qsb */
+    public MultiProperty getQsbAlpha(@HotseatQsbAlphaId int channelId) {
+        return mQsbAlphaChannels.get(channelId);
     }
 
     /**
@@ -294,4 +323,24 @@
         return mQsb;
     }
 
+    /** Dumps the Hotseat internal state */
+    public void dump(String prefix, PrintWriter writer) {
+        writer.println(prefix + "Hotseat:");
+        mIconsAlphaChannels.dump(
+                prefix + "\t",
+                writer,
+                "mIconsAlphaChannels",
+                "ALPHA_CHANNEL_TASKBAR_ALIGNMENT",
+                "ALPHA_CHANNEL_PREVIEW_RENDERER",
+                "ALPHA_CHANNEL_TASKBAR_STASH");
+        mQsbAlphaChannels.dump(
+                prefix + "\t",
+                writer,
+                "mQsbAlphaChannels",
+                "ALPHA_CHANNEL_TASKBAR_ALIGNMENT",
+                "ALPHA_CHANNEL_PREVIEW_RENDERER",
+                "ALPHA_CHANNEL_TASKBAR_STASH"
+        );
+    }
+
 }
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 0d1f652..0bc192d 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2675,6 +2675,7 @@
             }
 
             writer.println(prefix + "  Hotseat");
+            mHotseat.dump(prefix, writer);
             ViewGroup layout = mHotseat.getShortcutsAndWidgets();
             for (int j = 0; j < layout.getChildCount(); j++) {
                 Object tag = layout.getChildAt(j).getTag();
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index 2408955..4af9e2f 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -23,6 +23,7 @@
 import static com.android.launcher3.BubbleTextView.DISPLAY_TASKBAR;
 import static com.android.launcher3.BubbleTextView.DISPLAY_WORKSPACE;
 import static com.android.launcher3.DeviceProfile.DEFAULT_SCALE;
+import static com.android.launcher3.Hotseat.ALPHA_CHANNEL_PREVIEW_RENDERER;
 import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION;
 import static com.android.launcher3.Utilities.SHOULD_SHOW_FIRST_PAGE_WIDGET;
 import static com.android.launcher3.model.ModelUtils.filterCurrentWorkspaceItems;
@@ -320,12 +321,12 @@
         mUiHandler.post(() -> {
             if (mDp.isTaskbarPresent) {
                 // hotseat icons on bottom
-                mHotseat.setIconsAlpha(hide ? 0 : 1);
+                mHotseat.setIconsAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
                 if (mDp.isQsbInline) {
-                    mHotseat.setQsbAlpha(hide ? 0 : 1);
+                    mHotseat.setQsbAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
                 }
             } else {
-                mHotseat.setQsbAlpha(hide ? 0 : 1);
+                mHotseat.setQsbAlpha(hide ? 0 : 1, ALPHA_CHANNEL_PREVIEW_RENDERER);
             }
         });
     }
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index d3c423e..21e93c5 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -55,6 +55,7 @@
 import android.os.Parcelable;
 import android.os.RemoteException;
 import android.os.SystemClock;
+import android.os.Trace;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.InputDevice;
@@ -524,16 +525,19 @@
 
     Closable addContextLayer(String piece) {
         mDiagnosticContext.addLast(piece);
+        Trace.beginSection("Context: " + piece);
         log("Entering context: " + piece);
         return () -> {
+            Trace.endSection();
             log("Leaving context: " + piece);
             mDiagnosticContext.removeLast();
         };
     }
 
     public void dumpViewHierarchy() {
-        final ByteArrayOutputStream stream = new ByteArrayOutputStream();
         try {
+            Trace.beginSection("dumpViewHierarchy");
+            final ByteArrayOutputStream stream = new ByteArrayOutputStream();
             mDevice.dumpWindowHierarchy(stream);
             stream.flush();
             stream.close();
@@ -542,6 +546,8 @@
             }
         } catch (IOException e) {
             Log.e(TAG, "error dumping XML to logcat", e);
+        } finally {
+            Trace.endSection();
         }
     }
 
@@ -621,15 +627,20 @@
      */
     public void checkForAnomaly(
             boolean ignoreNavmodeChangeStates, boolean ignoreOnlySystemUiViews) {
-        if (mTestAnomalyChecker != null) mTestAnomalyChecker.run();
+        try {
+            Trace.beginSection("checkForAnomaly");
+            if (mTestAnomalyChecker != null) mTestAnomalyChecker.run();
 
-        final String systemAnomalyMessage =
-                getSystemAnomalyMessage(ignoreNavmodeChangeStates, ignoreOnlySystemUiViews);
-        if (systemAnomalyMessage != null) {
-            if (mOnFailure != null) mOnFailure.run();
-            Assert.fail(formatSystemHealthMessage(formatErrorWithEvents(
-                    "http://go/tapl : Tests are broken by a non-Launcher system error: "
-                            + systemAnomalyMessage, false)));
+            final String systemAnomalyMessage =
+                    getSystemAnomalyMessage(ignoreNavmodeChangeStates, ignoreOnlySystemUiViews);
+            if (systemAnomalyMessage != null) {
+                if (mOnFailure != null) mOnFailure.run();
+                Assert.fail(formatSystemHealthMessage(formatErrorWithEvents(
+                        "http://go/tapl : Tests are broken by a non-Launcher system error: "
+                                + systemAnomalyMessage, false)));
+            }
+        } finally {
+            Trace.endSection();
         }
     }
 
@@ -1005,16 +1016,20 @@
     }
 
     public void waitForLauncherInitialized() {
-        for (int i = 0; i < 100; ++i) {
-            if (getTestInfo(
-                    TestProtocol.REQUEST_IS_LAUNCHER_INITIALIZED).
-                    getBoolean(TestProtocol.TEST_INFO_RESPONSE_FIELD)) {
-                return;
+        try {
+            Trace.beginSection("waitForLauncherInitialized");
+            for (int i = 0; i < 100; ++i) {
+                if (getTestInfo(TestProtocol.REQUEST_IS_LAUNCHER_INITIALIZED).getBoolean(
+                        TestProtocol.TEST_INFO_RESPONSE_FIELD)) {
+                    return;
+                }
+                SystemClock.sleep(100);
             }
-            SystemClock.sleep(100);
+            checkForAnomaly();
+            fail("Launcher didn't initialize");
+        } finally {
+            Trace.endSection();
         }
-        checkForAnomaly();
-        fail("Launcher didn't initialize");
     }
 
     public boolean isLauncherActivityStarted() {
@@ -1259,8 +1274,13 @@
     }
 
     boolean isLauncherVisible() {
-        mDevice.waitForIdle();
-        return hasLauncherObject(getAnyObjectSelector());
+        try {
+            Trace.beginSection("isLauncherVisible");
+            mDevice.waitForIdle();
+            return hasLauncherObject(getAnyObjectSelector());
+        } finally {
+            Trace.endSection();
+        }
     }
 
     boolean isLauncherContainerVisible() {
diff --git a/tests/tapl/com/android/launcher3/tapl/OverviewTask.java b/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
index 5433fa7..9a8d952 100644
--- a/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
+++ b/tests/tapl/com/android/launcher3/tapl/OverviewTask.java
@@ -282,7 +282,7 @@
      * Returns whether the given String is contained in this Task's contentDescription. Also returns
      * true if both Strings are null.
      *
-     * TODO(b/326565120): remove Nullable support once the bug causing it to be null is fixed.
+     * TODO(b/342627272): remove Nullable support once the bug causing it to be null is fixed.
      */
     public boolean containsContentDescription(@Nullable String expected,
             OverviewSplitTask overviewSplitTask) {