diff --git a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/JetpackTaskFragmentOrganizer.java b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/JetpackTaskFragmentOrganizer.java
index 531df30a4e2cb..dd00189c3bf12 100644
--- a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/JetpackTaskFragmentOrganizer.java
+++ b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/JetpackTaskFragmentOrganizer.java
@@ -96,11 +96,11 @@ class JetpackTaskFragmentOrganizer extends TaskFragmentOrganizer {
      * @param activityIntent    Intent to start the secondary Activity with.
      * @param activityOptions   ActivityOptions to start the secondary Activity with.
      */
-    void startActivityToSide(IBinder launchingFragmentToken, Rect launchingFragmentBounds,
-            Activity launchingActivity, IBinder secondaryFragmentToken,
-            Rect secondaryFragmentBounds,  Intent activityIntent,
+    void startActivityToSide(@NonNull WindowContainerTransaction wct,
+            @NonNull IBinder launchingFragmentToken, @NonNull Rect launchingFragmentBounds,
+            @NonNull Activity launchingActivity, @NonNull IBinder secondaryFragmentToken,
+            @NonNull Rect secondaryFragmentBounds, @NonNull Intent activityIntent,
             @Nullable Bundle activityOptions) {
-        final WindowContainerTransaction wct = new WindowContainerTransaction();
         final IBinder ownerToken = launchingActivity.getActivityToken();
 
         // Create or resize the launching TaskFragment.
@@ -118,8 +118,6 @@ class JetpackTaskFragmentOrganizer extends TaskFragmentOrganizer {
 
         // Set adjacent to each other so that the containers below will be invisible.
         wct.setAdjacentTaskFragments(launchingFragmentToken, secondaryFragmentToken);
-
-        applyTransaction(wct);
     }
 
     /**
diff --git a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java
index 802976fbfc6d9..5b379c0db52b8 100644
--- a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java
+++ b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitController.java
@@ -296,12 +296,15 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
     }
 
     /**
-     * Creates and registers a new split with the provided containers and configuration.
+     * Creates and registers a new split with the provided containers and configuration. Finishes
+     * existing secondary containers if found for the given primary container.
      */
-    void registerSplit(@NonNull TaskFragmentContainer primaryContainer,
-            @NonNull Activity primaryActivity,
+    void registerSplit(@NonNull WindowContainerTransaction wct,
+            @NonNull TaskFragmentContainer primaryContainer, @NonNull Activity primaryActivity,
             @NonNull TaskFragmentContainer secondaryContainer,
             @NonNull ExtensionSplitPairRule splitPairRule) {
+        removeExistingSecondaryContainers(wct, primaryContainer);
+
         SplitContainer splitContainer = new SplitContainer(primaryContainer, primaryActivity,
                 secondaryContainer, splitPairRule);
         mSplitContainers.add(splitContainer);
@@ -323,6 +326,25 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
         mSplitContainers.removeAll(containersToRemove);
     }
 
+    /**
+     * Removes a secondary container for the given primary container if an existing split is
+     * already registered.
+     */
+    void removeExistingSecondaryContainers(@NonNull WindowContainerTransaction wct,
+            @NonNull TaskFragmentContainer primaryContainer) {
+        // If the primary container was already in a split - remove the secondary container that
+        // is now covered by the new one that replaced it.
+        final SplitContainer existingSplitContainer = getActiveSplitForContainer(
+                primaryContainer);
+        if (existingSplitContainer == null
+                || primaryContainer == existingSplitContainer.getSecondaryContainer()) {
+            return;
+        }
+
+        existingSplitContainer.getSecondaryContainer().finish(
+                false /* shouldFinishDependent */, mPresenter, wct, this);
+    }
+
     /**
      * Returns the topmost not finished container.
      */
diff --git a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitPresenter.java b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitPresenter.java
index 0f356291f50e5..47a1519ee6052 100644
--- a/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitPresenter.java
+++ b/libs/WindowManager/Jetpack/src/androidx/window/extensions/organizer/SplitPresenter.java
@@ -108,9 +108,10 @@ class SplitPresenter extends JetpackTaskFragmentOrganizer {
         // Set adjacent to each other so that the containers below will be invisible.
         wct.setAdjacentTaskFragments(
                 primaryContainer.getTaskFragmentToken(), secondaryContainer.getTaskFragmentToken());
-        applyTransaction(wct);
 
-        mController.registerSplit(primaryContainer, primaryActivity, secondaryContainer, rule);
+        mController.registerSplit(wct, primaryContainer, primaryActivity, secondaryContainer, rule);
+
+        applyTransaction(wct);
 
         return secondaryContainer;
     }
@@ -142,9 +143,10 @@ class SplitPresenter extends JetpackTaskFragmentOrganizer {
         // Set adjacent to each other so that the containers below will be invisible.
         wct.setAdjacentTaskFragments(
                 primaryContainer.getTaskFragmentToken(), secondaryContainer.getTaskFragmentToken());
-        applyTransaction(wct);
 
-        mController.registerSplit(primaryContainer, primaryActivity, secondaryContainer, rule);
+        mController.registerSplit(wct, primaryContainer, primaryActivity, secondaryContainer, rule);
+
+        applyTransaction(wct);
     }
 
     /**
@@ -202,20 +204,16 @@ class SplitPresenter extends JetpackTaskFragmentOrganizer {
         }
 
         TaskFragmentContainer secondaryContainer = mController.newContainer(null);
-        startActivityToSide(
-                primaryContainer.getTaskFragmentToken(),
-                primaryRectBounds,
-                launchingActivity,
-                secondaryContainer.getTaskFragmentToken(),
-                secondaryRectBounds,
-                activityIntent,
-                activityOptions);
+        final WindowContainerTransaction wct = new WindowContainerTransaction();
+        mController.registerSplit(wct, primaryContainer, launchingActivity, secondaryContainer,
+                rule);
+        startActivityToSide(wct, primaryContainer.getTaskFragmentToken(), primaryRectBounds,
+                launchingActivity, secondaryContainer.getTaskFragmentToken(), secondaryRectBounds,
+                activityIntent, activityOptions);
+        applyTransaction(wct);
 
         primaryContainer.setLastRequestedBounds(primaryRectBounds);
         secondaryContainer.setLastRequestedBounds(secondaryRectBounds);
-
-        mController.registerSplit(primaryContainer, launchingActivity, secondaryContainer,
-                rule);
     }
 
     /**