I have no idea how to explain these issues. Still, I recorded a couple of videos to help show what is happening; this behavior is new, I never experienced either of these two issues on Cubase 10, as I just updated today.
This one is some sort of weird issue with the mouse in Cubase; it’s glitching out and registering what I think are many multiple clicks of the Left mouse button? Maybe someone else has more info, and this doesn’t happen in any other piece of software. Watch the mouse cursor; I only click once.
In this second video, I’m having an issue with specific VST plugins causing some sort of GUI lag so severe it has been causing inputs to get backed up, especially when undoing-redoing or deleting multiple channels. It’s noticeable adding audio tracks, midi channels, or even adding instruments. As soon as I remove those certain VSTs the software works as it should, except for the other issue which I explain above ^^
It has happened with my old profiles/preferences, and I have since deleted all of my preferences, hoping it would alleviate, but I’ve had no such luck.