Aloha and same here. No window probs.
As JMCecil posted, I drank the kool-aid, RTFM and learned
the Steiny way of window management and so far all is well.
The OP did not list any gear used so
I now wonder if this could also be a Mac/PC thang?
I have always found over the years that anything to do with
visuals in Cubase is much snappier on PC. But my Mac
is also rock solid where window management is concerned.
Same situation on my laptop (where window management
can be critical).