Cubase: When I use the cut tool it takes a second for cubase to process the cut

Because the issue is only on Windows, I have made a whole post here with video examples. Apparently there’s no problem on Mac.
It stops doing that as soon as the Editor is closed whatsoever.
I show it in a minimalist way, and you would think this is not the same issue, but it is exactly the same issue, I’m just pointing out the root cause.