Hey, I think that I have found a small issue with BT.
Let's assume that we are doing a call with the BT headset and afterwards we end it. The dialer app or the data-dialing app (WhatsApp/Viber/etc) remain in the background, as expected.
If we try afterwards to play music with a music app (eg. Spotify), the music cannot be heard. But if you open the recent apps and swipe the dialing app from before to close it,the music continues automatically.
It's like the dialing app is "not giving back the sound" to other apps after the call.
I created a log by doing these steps:
1. Doing a call with Viber.
2. Ending the call.
3. Open Spotify to play music. The time of the song is starting, but cannot hear anything.
4. Open recent apps to close Viber.
5. Music from Spotify continues automatically.
https://paste.omnirom.org/view/2e5cf106
note: the same is happening when I use the default music app instead of Spotify.