Although set the default in preferences to NOT >Plug-in editors “Always on Top”<, but the Play plugin opens a always on top window.
When I rightclick in the top area to deselect “Always on Top”, Cubase does not react anymore. The audio/MIDI engine is still working, you can play VSTis and hear sound, but the UI is blocked and the Play plug-in does not open again. In the Task manager Cubase is now “inactive”.
Cubase Pro 10.0.50