App with API 6.4.2 doesn't start since firmware 16.22 anymore

Hi folks,
since the todays firmware on 16.22 on my fenix 7x my app (https://apps.garmin.com/de-DE/apps/fb178fa4-b5df-4b29-ac2f-cae16b991766) can't be started on the watch anymore. There is NO crash screen or anything. The app has no reaction at all. I've tryed a new installation of it - with the same failure.
In the SDK are njo changes. What's up here?
Greetings, Judex