Unity bug makes objects glitch with square patterns

I am currently working on a simulation and for some reason my game objects keep glitching / flickering random square patterns, both in the scene and game view. I have attached images for reference (all the objects are meant to be a single color, no patterns).

!conveyor belt glitch][1]

[1]: /storage/temp/197395-screenshot-2022-06-09-at-213938.png