Push notifications not working, ios 13.6

Upgraded ios 13.6 and changed bundle identifier and container name. Created CKDatabaseSubscription for both public and shared database and can see in cloudkit dashboard. Both didFinishLaunchingWithOptions and didRegisterForRemoteNotificationsWithDeviceToken get called in AppDelegate.

Code Block func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool{
  UNUserNotificationCenter.current().delegate = self
  UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler: { granted, error in
     
    guard granted else { return }
    DispatchQueue.main.async {
      application.registerForRemoteNotifications()
      print("Registered for Remote notifications")
       
    }
  })
  return true
}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data){
  let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) }
  let token = tokenParts.joined()
  print("Device Token: \(token)")
  })
  self.iCloudSubscribeToPrivateDB()
  self.iCloudSubscribeToSharedDB()
}

In the project both background fetch and remote notifications are enabled. I make databases changes in cloudkit dashboard, but push notifications are not being sent. They were working now just stopped after I made the above changes. What could be wrong?