Two quick questions: do you reproduce the same bug as me on the 3D attached to this question, namely, when cutting, then displaying in visible edges + shaded image (see the attached image), we see the edges that are supposed to be cut too?
And when I click on the 3D, it shows up on a white background, but when I put it in full screen, it shows a black background, same for you?
On the other hand, I just tested in the other direction (for the first question) i.e. first the visible edges mode in shaded image THEN the cut, and there it works...
And for the second question, I don't have the problem here, the background is gray and not in grid like on the attached image... full screen or not.