Upgraded to 12 a few days ago and already having issues and first problem I’ve encountered is trying to use AudioWarp in editor window. As I move cursor over the audio waves, it deletes the graphics and I also have no AudioWarp functionality.
I got rid of the same problem by uninstall all Steinberg stuff including Cubase 11 and reinstall Cubase 12.
(Don`t forget to export your profile before!! or you start from scratch with makros shortcuts and so on…)