Cannot play a track backward after reaching the end

[jrosener]

Steps to reproduce

1. Load a track and start turntable
2. Wait the end of the track (slider in waveform stops)
3. Turn vinyl backward

Results

Expected: the track should be played (reverse) starting from the end.
Actual: track is not played, no sound.
Workaround: click somewhere in waveform to jump into track (sound is comming again)