diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java b/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
index 9aac694..0479576 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/ShellTaskOrganizer.java
@@ -103,7 +103,7 @@
         default void onBackPressedOnTaskRoot(RunningTaskInfo taskInfo) {}
         /** Whether this task listener supports compat UI. */
         default boolean supportCompatUI() {
-            // All TaskListeners should support compat UI except PIP.
+            // All TaskListeners should support compat UI except PIP and StageCoordinator.
             return true;
         }
         /** Attaches a child window surface to the task surface. */
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/UserAspectRatioSettingsWindowManager.java b/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/UserAspectRatioSettingsWindowManager.java
index cbff464..77aefc8 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/UserAspectRatioSettingsWindowManager.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/compatui/UserAspectRatioSettingsWindowManager.java
@@ -208,7 +208,7 @@
     }
 
     private boolean getHasUserAspectRatioSettingsButton(@NonNull TaskInfo taskInfo) {
-        return  taskInfo.topActivityEligibleForUserAspectRatioButton
+        return taskInfo.topActivityEligibleForUserAspectRatioButton
                 && (taskInfo.topActivityBoundsLetterboxed
                     || taskInfo.isUserFullscreenOverrideEnabled);
     }
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 842b1bf..94fa485 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
@@ -228,6 +228,15 @@
     private final Toast mSplitUnsupportedToast;
     private SplitRequest mSplitRequest;
 
+    /**
+     * Since StageCoordinator only coordinates MainStage and SideStage, it shouldn't support
+     * CompatUI layouts. CompatUI is handled separately by MainStage and SideStage.
+     */
+    @Override
+    public boolean supportCompatUI() {
+        return false;
+    }
+
     class SplitRequest {
         @SplitPosition
         int mActivatePosition;