[daniel]

I did some more testing and found out that my problem also shows up, when I go to the android home screen or multitasking view while viewing a score. In the end I found the setting causing the problem. I had the setting "Hide the Navigation Bar" enabled. Now I disabled it and my problem is gone. There seems to be a problem within that logic. I do not need this setting, because I am using the Boox gestures and therefore have no navigation bar.