diff --git a/services/core/java/com/android/server/wm/TaskDisplayArea.java b/services/core/java/com/android/server/wm/TaskDisplayArea.java
index 79be9463aa05b..2086b522aa668 100644
--- a/services/core/java/com/android/server/wm/TaskDisplayArea.java
+++ b/services/core/java/com/android/server/wm/TaskDisplayArea.java
@@ -1222,7 +1222,7 @@ final class TaskDisplayArea extends DisplayArea<WindowContainer> {
 
         // Clear last paused activity if focused root task changed while sleeping, so that the
         // top activity of current focused task can be resumed.
-        if (mDisplayContent.isSleeping()) {
+        if (mDisplayContent.isSleeping() && currentFocusedTask != null) {
             currentFocusedTask.clearLastPausedActivity();
         }