I was working on this model and everything was going fine. After I finished making the hands I took a look at the full model and noticed this weird flickering. Naturally I tried merging by distance and recalculating the normals, but nothing changed, the flickering continued when I switched render engines.
I tried re-opening Blender and restarting my computer but the problem continued.
Here's video: Weird flickering in Blender 2.83
What troubles me the most is that it wasn't happening earlier today, I clearly made a mistake or pushed a wrong button in the process of modeling, but I have no idea what exactly.
EDIT: Google-Drive Blend File