To Duplicate:
- Open MM:A and play (or skip to) a track for more than 5 seconds.
- Pause the playback.
- At this point, expected behavior of rewind button is to restart track playback.
- Go to Android home screen.
- Pull down the notifications screen, and stop MM:A with the "Stop" button.
- You could also let it end by itself by not running MM:A long enough that Android reclaims the memory.
- Launch MM:A, and go to the "Now Playing" screen.
- Without pressing "Play" press "Rewind."
- Instead of restarting the currently shown track, the previous track is played.