Check this simple aia: TaifunPlayerTest.aia (161.2 KB)
You can test it with Companion or compiled app (APK).
Both should work in standby / background (after pressing the device Home button).
Tested on Android 4, 5, 6, 7, 8, 9, 10.
If it doesn't work for you, let us know which device / Android version you are using.