When I try to close some vst effect windows as the Cableguys PanCake2 or the NAT 3D sound mixer the windows don’t disappear. They only turn black and I can’t close them. When loading the effects again the old black windows are still there.
to our knowledge this happens in an unsupported case: the plug-in overlays a window based on a different framework than Cubase’s. This cannot be fixed on our side.
Can you please try the following:
Running Cubase in 64-bit (as far as I’m aware this affects the 32-bit version only)
Use the VST3 version of the plug-in, if available, as VST3 supports the above scenario.