Weird flickering on Materials


I have a problem with material flickering.
As seen in the video, the material is just a simple material with a Metal, Roughness and Specular value.
But as i move around the view, the material flickers wild, no matter what values i put in.
It seems it has to do with the ground getting black and white but i don’t know why.
Anyone know what is causing this?

Thanks in advance.

This started with all metallic materials in 4.25 with me… no idea I’m afraid…

wow, this seems like a huge bug then.
Why is no one talking about that?

The lighting in 25 is a bit weird, full stop…