[Zubersoft]

That does sound like it may have something to do with the graphics driver (or hardware) on your device. I move MobileSheets between monitors all the time (and each monitor has a different resolution and display scaling in Windows) and I don't seem to encounter any issues with freezing. Just to verify, does the freezing only occur if the audio is actively playing when you move the window? Or do you move the window to the second monitor, then play the audio and it freezes?

As far as the quick action box, is the play icon not orange for you while the audio is playing?

Thanks,
Mike