diff --git a/services/core/java/com/android/server/notification/NotificationManagerService.java b/services/core/java/com/android/server/notification/NotificationManagerService.java
index f836a6c4af7af..b7fc38d8c8670 100755
--- a/services/core/java/com/android/server/notification/NotificationManagerService.java
+++ b/services/core/java/com/android/server/notification/NotificationManagerService.java
@@ -9404,10 +9404,16 @@ public class NotificationManagerService extends SystemService {
      * given NAS is bound in.
      */
     private boolean isInteractionVisibleToListener(ManagedServiceInfo info, int userId) {
-        boolean isAssistantService = mAssistants.isServiceTokenValidLocked(info.service);
+        boolean isAssistantService = isServiceTokenValid(info.service);
         return !isAssistantService || info.isSameUser(userId);
     }
 
+    private boolean isServiceTokenValid(IInterface service) {
+        synchronized (mNotificationLock) {
+            return mAssistants.isServiceTokenValidLocked(service);
+        }
+    }
+
     private boolean isPackageSuspendedForUser(String pkg, int uid) {
         final long identity = Binder.clearCallingIdentity();
         int userId = UserHandle.getUserId(uid);
@@ -10652,7 +10658,7 @@ public class NotificationManagerService extends SystemService {
                 BackgroundThread.getHandler().post(() -> {
                     if (info.isSystem
                             || hasCompanionDevice(info)
-                            || mAssistants.isServiceTokenValidLocked(info.service)) {
+                            || isServiceTokenValid(info.service)) {
                         notifyNotificationChannelChanged(
                                 info, pkg, user, channel, modificationType);
                     }