# lspci | grep VGA
You didn't specify what GPU and driver you use. But from the looks of it, it could be an issue with Nvidia'sproprietary OpenGL, which it very often is. Try may be installing the latest or beta driver from Nvidia?
# apt list
nvidia-driver
nvidia-driver/testing,now
535.216.03-2 amd64 [installed]
Everything worked fine before that upgrade of this
"kwin-wayland" package today...
Best regards,
Rafal