If you have more tracks in a edit an the timeline is scaled so that you not see all tracks, it jumps always to the first track when pressing play or selecting a part in the timeline. Please see https://www.youtube.com/watch?v=fCjKNPFWEgc
One more informtion. I found out that this problem only happens when the timeline is minimized to the smallest view. In the standard view this dosnt happens.
This has already been fixed in master. *** This bug has been marked as a duplicate of bug 371982 ***