I noted that happen with some apps. In the moment you open a window (for example, Appearance Properties) and if the window does not appear, but the process exists, it means that the window became invisible and make a "dead zone". It happens also in Classic session with Unity Window Manager.
I noted that happen with some apps. In the moment you open a window (for example, Appearance Properties) and if the window does not appear, but the process exists, it means that the window became invisible and make a "dead zone". It happens also in Classic session with Unity Window Manager.