Post moved.
The first thing I would try is to update your video card drivers.
It may be an OpenGL issue.
Does the same thing happen if you use the Vectorial (Internal) engine when in the 3D window?
What are your machine specs?
Best to add this to your profile signature so it appears in all posts (profile link is at the top of this page).
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11