The navigation bar doesn't work when playing music. Usually the marker doesn't move as a song plays. Sometimes it does move but it will not respond to mouse clicks (to drag it). The current/total time isn't displayed while it's playing in either case. If I enable a visualization it all works fine, but that eats up my battery.
I can't confirm this bug. Since your report is quite old, please test again with git master and file a new report if the problem still occurs.