1 files changed, 7 insertions, 12 deletions
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageTaskListener.java b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageTaskListener.java
index ead0bcd15c73..a841b7f96d3c 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageTaskListener.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageTaskListener.java
@@ -220,20 +220,12 @@ class StageTaskListener implements ShellTaskOrganizer.TaskListener {
                 mCallbacks.onNoLongerSupportMultiWindow();
                 return;
             }
-            if (taskInfo.topActivity == null && mChildrenTaskInfo.contains(taskInfo.taskId)
-                    && mChildrenTaskInfo.get(taskInfo.taskId).topActivity != null) {
-                // If top activity become null, it means the task is about to vanish, we use this
-                // signal to remove it from children list earlier for smooth dismiss transition.
-                mChildrenTaskInfo.remove(taskInfo.taskId);
-                mChildrenLeashes.remove(taskInfo.taskId);
-            } else {
-                mChildrenTaskInfo.put(taskInfo.taskId, taskInfo);
-            }
+            mChildrenTaskInfo.put(taskInfo.taskId, taskInfo);
             mCallbacks.onChildTaskStatusChanged(taskInfo.taskId, true /* present */,
                     taskInfo.isVisible);
-            if (!ENABLE_SHELL_TRANSITIONS && mChildrenLeashes.contains(taskInfo.taskId)) {
-                updateChildTaskSurface(taskInfo, mChildrenLeashes.get(taskInfo.taskId),
-                        false /* firstAppeared */);
+            if (!ENABLE_SHELL_TRANSITIONS) {
+                updateChildTaskSurface(
+                        taskInfo, mChildrenLeashes.get(taskInfo.taskId), false /* firstAppeared */);
             }
         } else {
             throw new IllegalArgumentException(this + "\n Unknown task: " + taskInfo
@@ -267,6 +259,9 @@ class StageTaskListener implements ShellTaskOrganizer.TaskListener {
                 return;
             }
             sendStatusChanged();
+        } else {
+            throw new IllegalArgumentException(this + "\n Unknown task: " + taskInfo
+                    + "\n mRootTaskInfo: " + mRootTaskInfo);
         }
     }