How bizarre…can’t say I’ve ever seen this in more than twenty years of using Cubase. It’s clearly not just your set-up if it’s moved from one computer to another but may be something in the way you use it? I’m not denying it’s been an issue for you and indeed rodger but suspect no further input from Steinberg means most folk don’t see it.
Does trashing (or renaming) the preferences file always cure it or was that just once?
Did you ever upload a video?