Default music app for bluetooth audio Situation: Connected to BT audio device, listening to Spotify app.  Press pause on the BT device (car stereo), then press play.

Expected behaviour:  The music being played by Spotify pauses, then resumes

Actual behaviour: The music being played by Spotify pauses, then the Apollo music player launches and starts playing.  Most likely to be completely different music.

Extra information: Apollo is the OEM music player which I occasionally use and don't want to uninstall.  HTC One X runnning Android 4.2.2 CyanogenMod 10.1

Can I fix this annoying behaviour?
If you want a specific app to react to bluetooth commands, you have to set it to high priority. I know PowerAmp has such a setting. Check the spotify settings for a high priority option.