Playback error + other symptoms

Unknown steps due to how random it is (non-guaranteed these steps reproduces the bug) on how it happens but there are symptoms on how it might happen.

First i press Rewind To Start Position and press play.
The playback doesnt play but the play shows that the function is happening.
You cannot select any notes to skip where you want the play to start or skip to.
Then the program becomes Not Responding (with 0% cpu usage)
I just close it and reopen then.

I think it happens when you sleep your computer