I’ve been having issues lately:
Changing tracks while playing a song can cause the VSTs to stutter for a moment.
Sometimes when I’ve had a VST’s window open, the audio performance goes through the roof even though it’s not playing. Playing is even worse causing a lot of stuttering from increased load my PC can’t handle.
Right clicking on something like my Windows mixer while a project is playing, even if it has nothing in it as a new blank project, causes Cubase to freeze for a few seconds then just crash to desktop with no error message nor notice.
EDIT: Actually Cubase just crashes if I right click on my Windows mixer taskbar icon at all, but everything else seems OK for right click.
In the case of right clicking, when I open Cubase again and it asks about safe mode, it says it terminated due to MMDevAPI.DLL