diff --git a/services/core/java/com/android/server/wm/AppTransition.java b/services/core/java/com/android/server/wm/AppTransition.java
index a57463c..7bd0635 100644
--- a/services/core/java/com/android/server/wm/AppTransition.java
+++ b/services/core/java/com/android/server/wm/AppTransition.java
@@ -559,6 +559,7 @@
             set.addAnimation(clipAnimTB);
             set.addAnimation(translateY);
             set.addAnimation(alpha);
+            set.setZAdjustment(Animation.ZORDER_TOP);
             set.initialize(appWidth, appHeight, appWidth, appHeight);
             anim = set;
         } else {