Graphic issues in LO calc

I randomly get an area of field of my data sheet displayed wrong (see picture). Activating, deactivating anti-aliasing didnt help. When I scroll out of the area and back or overlap it with another window it appears normal again.
Iam using LO fresh (5.2.5.1) but it also happens to me with the stable (5.1) version.
Any hints?

Greetings

I cannot upload a photo because I do not have “3 Points” ??
So I see a lot of cells totally black, , sometimes half of the cell black, numbers crossed etc.