TMapview: Empty map in final but working in developer version

[stewag64 8]

I have a strange problem with a TMapview:

Map and markers are displayed perfectly okay if compiled in "Developer"configuration, but when I compile an aab file for Google Play, the TMapview stays completely empty. 

Only the Google logo and the zoom buttons are displayed.

I know that this is usually a sign for a wrong API key, but as the developer version works, with the same settings, it must be something else.

 

As a workaround, I set "Application restrictions" from the package name and SHA-1 fingerprint of my app to "None" in Google API Console and instead added an API restriction on "Maps SDK for Android".

 

Does anybody have an idea what might be the cause for this "split-behaviour"?

 

Steffen