4.0 all versions, Sound blip if you roll back before start of track

Posted a video to show whats up

If you drag a track back that has an immediate beat right at 00:00 with no lead in you can hear a part of it quick if you rewind the track back into the blank area and let go, each time u press play, pause, play, pause in the blank space you hear a quick part of the track

https://dl.dropboxusercontent.com/u/1184069/iShowU-Capture2.mov