Also with the latest 3.4.29 release the app is unusable because the phone rings only when the phone is unlocked and the app started.
I see this behaviour both when running in standlone mode and integration mode.

some details:

- I open the app: the phone registers to my asterisk server
incoming calls are possible

- I push the stdby button of the phone
after a about 20 seconds asterisk says "Unregistered 'myphone' " and then calls to the phone are not going through anymore.

- phone is Samsung Note 10+ with Android 10

Maybe somebody has an idea how to tell the phone NOT to kill/disable the app in stdby mode?
Btw: during app initial configuration I was requested to enable "foreground mode" ... but I have no idea where I can do that. Maybe this is exactly the root of the problem?

Thank you in advance!