@Portisch
Here are the debug-logs:
https://filebin.net/uij33x099t6j61pd
But in the debug-build it is working! very strange.
Turning BT-device on and off while playing switches between TV and BT-audio almost instantly.
I tried it back and forth.
So, no error or bug with this debug-build.
What can I do to make my other installation working like the debug-build? deleting userdata/addon-data?