ISSUE
The "Previous Track" button has two functions:
- First second of a track: Play the previous track (not if current track is first track)
- After first second of a track: Restart the current track

In the second case (restart current track) there exists an issue:
Restarting the current track will cause the music to restart again after two seconds.

The playback skips back to the beginning of the track at two seconds.
The playback / seek bar does not visually reflect this unwanted behavior in any way.

The issue does not occur if you first "Pause" the playback and then click "Previous Track".

The issue also does not occur if you restart the currently playing track by clicking on its name in the track list.

OS
Windows 10

STEPS
- Start playback of any soundtrack album
- Use the seek bar to skip to the middle of the track
- Click the "Previous Track" button
- Listen carefully to the restarting track

RESULTS
The audio playback skips back to the beginning of the track at two seconds.

EXPECTED
No issues with audio playback.

Maybe you could always play the previous track to avoid this code path?
Or take a look at the functionality of the button if playback is paused; as said above the issue does not happen in this case.