Sorry to hear that.
It’s clear that the video section of Cubase is the Cinderella of the program. It needs fixing now. I’m lucky in that the fix worked for me and I now haven’t an issue, but that’s not good enough.
I’m assuming that Nuendo doesn’t have this issue. Can’t the relevant files be transferred for Nuendo to Cubase?
More silence from Steinberg on this issue isn’t tolerable. Come on Hamburg, please sort this out.