diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreen.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreen.java
index 6aad4e2..8df287d 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreen.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreen.java
@@ -69,7 +69,9 @@
         default void onSplitVisibilityChanged(boolean visible) {}
     }
 
-    /** Callback interface for listening to requests to enter split select */
+    /**
+     * Callback interface for listening to requests to enter split select. Used for desktop -> split
+     */
     interface SplitSelectListener {
         default boolean onRequestEnterSplitSelect(ActivityManager.RunningTaskInfo taskInfo,
                 int splitPosition, Rect taskBounds) {
@@ -90,6 +92,24 @@
     /** Unregisters listener that gets split screen callback. */
     void unregisterSplitScreenListener(@NonNull SplitScreenListener listener);
 
+    interface SplitInvocationListener {
+        /**
+         * Called whenever shell starts or stops the split screen animation
+         * @param animationRunning if {@code true} the animation has begun, if {@code false} the
+         *                         animation has finished
+         */
+        default void onSplitAnimationInvoked(boolean animationRunning) { }
+    }
+
+    /**
+     * Registers a {@link SplitInvocationListener} to notify when the animation to enter split
+     * screen has started and stopped
+     *
+     * @param executor callbacks to the listener will be executed on this executor
+     */
+    void registerSplitAnimationListener(@NonNull SplitInvocationListener listener,
+            @NonNull Executor executor);
+
     /** Called when device waking up finished. */
     void onFinishedWakingUp();
 
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
index 547457b..b9d70e1 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java
@@ -1166,6 +1166,12 @@
         }
 
         @Override
+        public void registerSplitAnimationListener(@NonNull SplitInvocationListener listener,
+                @NonNull Executor executor) {
+            mStageCoordinator.registerSplitAnimationListener(listener, executor);
+        }
+
+        @Override
         public void onFinishedWakingUp() {
             mMainExecutor.execute(SplitScreenController.this::onFinishedWakingUp);
         }
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenTransitions.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenTransitions.java
index 1a53a1d..6e5b767 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenTransitions.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenTransitions.java
@@ -55,6 +55,7 @@
 import com.android.wm.shell.transition.Transitions;
 
 import java.util.ArrayList;
+import java.util.concurrent.Executor;
 
 /** Manages transition animations for split-screen. */
 class SplitScreenTransitions {
@@ -79,6 +80,8 @@
 
     private Transitions.TransitionFinishCallback mFinishCallback = null;
     private SurfaceControl.Transaction mFinishTransaction;
+    private SplitScreen.SplitInvocationListener mSplitInvocationListener;
+    private Executor mSplitInvocationListenerExecutor;
 
     SplitScreenTransitions(@NonNull TransactionPool pool, @NonNull Transitions transitions,
             @NonNull Runnable onFinishCallback, StageCoordinator stageCoordinator) {
@@ -353,6 +356,10 @@
                     + " skip to start enter split transition since it already exist. ");
             return null;
         }
+        if (mSplitInvocationListenerExecutor != null && mSplitInvocationListener != null) {
+            mSplitInvocationListenerExecutor.execute(() -> mSplitInvocationListener
+                    .onSplitAnimationInvoked(true /*animationRunning*/));
+        }
         final IBinder transition = mTransitions.startTransition(transitType, wct, handler);
         setEnterTransition(transition, remoteTransition, extraTransitType, resizeAnim);
         return transition;
@@ -457,6 +464,7 @@
 
             mPendingEnter.onConsumed(aborted);
             mPendingEnter = null;
+            mStageCoordinator.notifySplitAnimationFinished();
             ProtoLog.d(WM_SHELL_SPLIT_SCREEN, "onTransitionConsumed for enter transition");
         } else if (isPendingDismiss(transition)) {
             mPendingDismiss.onConsumed(aborted);
@@ -529,6 +537,12 @@
         mTransitions.getAnimExecutor().execute(va::start);
     }
 
+    public void registerSplitAnimListener(@NonNull SplitScreen.SplitInvocationListener listener,
+            @NonNull Executor executor) {
+        mSplitInvocationListener = listener;
+        mSplitInvocationListenerExecutor = executor;
+    }
+
     /** Calls when the transition got consumed. */
     interface TransitionConsumedCallback {
         void onConsumed(boolean aborted);
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java
index 5e9451a..b10176d 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java
@@ -157,6 +157,7 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.Set;
+import java.util.concurrent.Executor;
 
 /**
  * Coordinates the staging (visibility, sizing, ...) of the split-screen {@link MainStage} and
@@ -237,6 +238,9 @@
     private DefaultMixedHandler mMixedHandler;
     private final Toast mSplitUnsupportedToast;
     private SplitRequest mSplitRequest;
+    /** Used to notify others of when shell is animating into split screen */
+    private SplitScreen.SplitInvocationListener mSplitInvocationListener;
+    private Executor mSplitInvocationListenerExecutor;
 
     /**
      * Since StageCoordinator only coordinates MainStage and SideStage, it shouldn't support
@@ -247,6 +251,14 @@
         return false;
     }
 
+    /** NOTE: Will overwrite any previously set {@link #mSplitInvocationListener} */
+    public void registerSplitAnimationListener(
+            @NonNull SplitScreen.SplitInvocationListener listener, @NonNull Executor executor) {
+        mSplitInvocationListener = listener;
+        mSplitInvocationListenerExecutor = executor;
+        mSplitTransitions.registerSplitAnimListener(listener, executor);
+    }
+
     class SplitRequest {
         @SplitPosition
         int mActivatePosition;
@@ -535,7 +547,7 @@
                             null /* childrenToTop */, EXIT_REASON_UNKNOWN));
                     Log.w(TAG, splitFailureMessage("startShortcut",
                             "side stage was not populated"));
-                    mSplitUnsupportedToast.show();
+                    handleUnsupportedSplitStart();
                 }
 
                 if (finishedCallback != null) {
@@ -666,7 +678,7 @@
                             null /* childrenToTop */, EXIT_REASON_UNKNOWN));
                     Log.w(TAG, splitFailureMessage("startIntentLegacy",
                             "side stage was not populated"));
-                    mSplitUnsupportedToast.show();
+                    handleUnsupportedSplitStart();
                 }
 
                 if (apps != null) {
@@ -1287,7 +1299,7 @@
                             ? mSideStage : mMainStage, EXIT_REASON_UNKNOWN));
             Log.w(TAG, splitFailureMessage("onRemoteAnimationFinishedOrCancelled",
                     "main or side stage was not populated."));
-            mSplitUnsupportedToast.show();
+            handleUnsupportedSplitStart();
         } else {
             mSyncQueue.queue(evictWct);
             mSyncQueue.runInSync(t -> {
@@ -1308,7 +1320,7 @@
                     ? mSideStage : mMainStage, EXIT_REASON_UNKNOWN));
             Log.w(TAG, splitFailureMessage("onRemoteAnimationFinished",
                     "main or side stage was not populated"));
-            mSplitUnsupportedToast.show();
+            handleUnsupportedSplitStart();
             return;
         }
 
@@ -2890,6 +2902,7 @@
             if (hasEnteringPip) {
                 mMixedHandler.animatePendingEnterPipFromSplit(transition, info,
                         startTransaction, finishTransaction, finishCallback);
+                notifySplitAnimationFinished();
                 return true;
             }
 
@@ -2924,6 +2937,7 @@
                 //                    the transition, or synchronize task-org callbacks.
             }
             // Use normal animations.
+            notifySplitAnimationFinished();
             return false;
         } else if (mMixedHandler != null && TransitionUtil.hasDisplayChange(info)) {
             // A display-change has been un-expectedly inserted into the transition. Redirect
@@ -2937,6 +2951,7 @@
                     mSplitLayout.update(startTransaction, true /* resetImePosition */);
                     startTransaction.apply();
                 }
+                notifySplitAnimationFinished();
                 return true;
             }
         }
@@ -3110,7 +3125,7 @@
                     pendingEnter.mRemoteHandler.onTransitionConsumed(transition,
                             false /*aborted*/, finishT);
                 }
-                mSplitUnsupportedToast.show();
+                handleUnsupportedSplitStart();
                 return true;
             }
         }
@@ -3139,6 +3154,7 @@
         final TransitionInfo.Change finalMainChild = mainChild;
         final TransitionInfo.Change finalSideChild = sideChild;
         enterTransition.setFinishedCallback((callbackWct, callbackT) -> {
+            notifySplitAnimationFinished();
             if (finalMainChild != null) {
                 if (!mainNotContainOpenTask) {
                     mMainStage.evictOtherChildren(callbackWct, finalMainChild.getTaskInfo().taskId);
@@ -3560,6 +3576,19 @@
                 mSplitLayout.isLeftRightSplit());
     }
 
+    private void handleUnsupportedSplitStart() {
+        mSplitUnsupportedToast.show();
+        notifySplitAnimationFinished();
+    }
+
+    void notifySplitAnimationFinished() {
+        if (mSplitInvocationListener == null || mSplitInvocationListenerExecutor == null) {
+            return;
+        }
+        mSplitInvocationListenerExecutor.execute(() ->
+                mSplitInvocationListener.onSplitAnimationInvoked(false /*animationRunning*/));
+    }
+
     /**
      * Logs the exit of splitscreen to a specific stage. This must be called before the exit is
      * executed.
@@ -3622,7 +3651,7 @@
                 if (!ENABLE_SHELL_TRANSITIONS) {
                     StageCoordinator.this.exitSplitScreen(isMainStage ? mMainStage : mSideStage,
                             EXIT_REASON_APP_DOES_NOT_SUPPORT_MULTIWINDOW);
-                    mSplitUnsupportedToast.show();
+                    handleUnsupportedSplitStart();
                     return;
                 }
 
@@ -3642,7 +3671,7 @@
                         "app package " + taskInfo.baseActivity.getPackageName()
                         + " does not support splitscreen, or is a controlled activity type"));
                 if (splitScreenVisible) {
-                    mSplitUnsupportedToast.show();
+                    handleUnsupportedSplitStart();
                 }
             }
         }
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitTransitionTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitTransitionTests.java
index befc702..34b2eeb 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitTransitionTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/SplitTransitionTests.java
@@ -39,10 +39,13 @@
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
 
 import android.annotation.NonNull;
 import android.app.ActivityManager;
@@ -63,6 +66,7 @@
 import com.android.wm.shell.ShellTaskOrganizer;
 import com.android.wm.shell.ShellTestCase;
 import com.android.wm.shell.TestRunningTaskInfoBuilder;
+import com.android.wm.shell.TestShellExecutor;
 import com.android.wm.shell.common.DisplayController;
 import com.android.wm.shell.common.DisplayImeController;
 import com.android.wm.shell.common.DisplayInsetsController;
@@ -105,6 +109,8 @@
     @Mock private ShellExecutor mMainExecutor;
     @Mock private LaunchAdjacentController mLaunchAdjacentController;
     @Mock private DefaultMixedHandler mMixedHandler;
+    @Mock private SplitScreen.SplitInvocationListener mInvocationListener;
+    private final TestShellExecutor mTestShellExecutor = new TestShellExecutor();
     private SplitLayout mSplitLayout;
     private MainStage mMainStage;
     private SideStage mSideStage;
@@ -147,6 +153,7 @@
                 .setParentTaskId(mSideStage.mRootTaskInfo.taskId).build();
         doReturn(mock(SplitDecorManager.class)).when(mMainStage).getSplitDecorManager();
         doReturn(mock(SplitDecorManager.class)).when(mSideStage).getSplitDecorManager();
+        mStageCoordinator.registerSplitAnimationListener(mInvocationListener, mTestShellExecutor);
     }
 
     @Test
@@ -452,6 +459,15 @@
         mMainStage.activate(new WindowContainerTransaction(), true /* includingTopTask */);
     }
 
+    @Test
+    @UiThreadTest
+    public void testSplitInvocationCallback() {
+        enterSplit();
+        mTestShellExecutor.flushAll();
+        verify(mInvocationListener, times(1))
+                .onSplitAnimationInvoked(eq(true));
+    }
+
     private boolean containsSplitEnter(@NonNull WindowContainerTransaction wct) {
         for (int i = 0; i < wct.getHierarchyOps().size(); ++i) {
             WindowContainerTransaction.HierarchyOp op = wct.getHierarchyOps().get(i);
diff --git a/packages/SystemUI/shared/src/com/android/systemui/shared/system/QuickStepContract.java b/packages/SystemUI/shared/src/com/android/systemui/shared/system/QuickStepContract.java
index c08b083..69aa909 100644
--- a/packages/SystemUI/shared/src/com/android/systemui/shared/system/QuickStepContract.java
+++ b/packages/SystemUI/shared/src/com/android/systemui/shared/system/QuickStepContract.java
@@ -77,7 +77,7 @@
     // settings is expanded.
     public static final int SYSUI_STATE_QUICK_SETTINGS_EXPANDED = 1 << 11;
     // Winscope tracing is enabled
-    public static final int SYSUI_STATE_TRACING_ENABLED = 1 << 12;
+    public static final int SYSUI_STATE_DISABLE_GESTURE_SPLIT_INVOCATION = 1 << 12;
     // The Assistant gesture should be constrained. It is up to the launcher implementation to
     // decide how to constrain it
     public static final int SYSUI_STATE_ASSIST_GESTURE_CONSTRAINED = 1 << 13;
@@ -148,7 +148,7 @@
             SYSUI_STATE_OVERVIEW_DISABLED,
             SYSUI_STATE_HOME_DISABLED,
             SYSUI_STATE_SEARCH_DISABLED,
-            SYSUI_STATE_TRACING_ENABLED,
+            SYSUI_STATE_DISABLE_GESTURE_SPLIT_INVOCATION,
             SYSUI_STATE_ASSIST_GESTURE_CONSTRAINED,
             SYSUI_STATE_BUBBLES_EXPANDED,
             SYSUI_STATE_DIALOG_SHOWING,
@@ -211,8 +211,8 @@
         if ((flags & SYSUI_STATE_A11Y_BUTTON_LONG_CLICKABLE) != 0) {
             str.add("a11y_long_click");
         }
-        if ((flags & SYSUI_STATE_TRACING_ENABLED) != 0) {
-            str.add("tracing");
+        if ((flags & SYSUI_STATE_DISABLE_GESTURE_SPLIT_INVOCATION) != 0) {
+            str.add("disable_gesture_split_invocation");
         }
         if ((flags & SYSUI_STATE_ASSIST_GESTURE_CONSTRAINED) != 0) {
             str.add("asst_gesture_constrain");
diff --git a/packages/SystemUI/src/com/android/systemui/recents/OverviewProxyService.java b/packages/SystemUI/src/com/android/systemui/recents/OverviewProxyService.java
index 0673dcd..76bd80f 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/OverviewProxyService.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/OverviewProxyService.java
@@ -37,7 +37,6 @@
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_STATUS_BAR_KEYGUARD_GOING_AWAY;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_STATUS_BAR_KEYGUARD_SHOWING;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_STATUS_BAR_KEYGUARD_SHOWING_OCCLUDED;
-import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_TRACING_ENABLED;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_VOICE_INTERACTION_WINDOW_SHOWING;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_WAKEFULNESS_TRANSITION;
 
@@ -118,8 +117,6 @@
 import com.android.wm.shell.desktopmode.DesktopModeStatus;
 import com.android.wm.shell.sysui.ShellInterface;
 
-import dagger.Lazy;
-
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.List;
@@ -131,6 +128,8 @@
 import javax.inject.Inject;
 import javax.inject.Provider;
 
+import dagger.Lazy;
+
 /**
  * Class to send information from overview to launcher with a binder.
  */
@@ -701,8 +700,7 @@
             // Listen for tracing state changes
             @Override
             public void onTracingStateChanged(boolean enabled) {
-                mSysUiState.setFlag(SYSUI_STATE_TRACING_ENABLED, enabled)
-                        .commitUpdate(mContext.getDisplayId());
+                // TODO(b/286509643) Cleanup callers of this; Unused downstream
             }
 
             @Override
diff --git a/packages/SystemUI/src/com/android/systemui/wmshell/WMShell.java b/packages/SystemUI/src/com/android/systemui/wmshell/WMShell.java
index 263ddc1..b86a7c9 100644
--- a/packages/SystemUI/src/com/android/systemui/wmshell/WMShell.java
+++ b/packages/SystemUI/src/com/android/systemui/wmshell/WMShell.java
@@ -21,6 +21,7 @@
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_MANAGE_MENU_EXPANDED;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_DIALOG_SHOWING;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_FREEFORM_ACTIVE_IN_DESKTOP_MODE;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_DISABLE_GESTURE_SPLIT_INVOCATION;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_NOTIFICATION_PANEL_EXPANDED;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_ONE_HANDED_ACTIVE;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_QUICK_SETTINGS_EXPANDED;
@@ -273,6 +274,13 @@
                 splitScreen.setSplitscreenFocus(leftOrTop);
             }
         });
+        splitScreen.registerSplitAnimationListener(new SplitScreen.SplitInvocationListener() {
+            @Override
+            public void onSplitAnimationInvoked(boolean animationRunning) {
+                mSysUiState.setFlag(SYSUI_STATE_DISABLE_GESTURE_SPLIT_INVOCATION, animationRunning)
+                        .commitUpdate(mDisplayTracker.getDefaultDisplayId());
+            }
+        }, mSysUiMainExecutor);
     }
 
     @VisibleForTesting