Android Notifications don't appear unter Android 14

[bcvs 0]

Hi everybody,

After I was able to compile sample app AndroidNotificationServiceDemo I run into the next problem:
 

In this example an android service is started, which sends a notification after 8 seconds. As long as the app runs this works fine. But when I stop the app within the 8 seconds using the android task manager, no notifcation appears under Android 14.

 

I tested it on an older phone with Android 9. Here I see the notification even when the app ist not running, as i should be.

Any ideas how I can get the notifications on Android 14?