Rendering 4k causes weird artefacts

Hello.
I have noticed a very strange artefacts when I started rendering my level sequence in 4k resolution (3840x2160).

I didn’t use any command lines in Movie Render Queue.
Here’s the 4k render

Here’s the 1080p render

So far I have noticed that this happens to Paragon assets… for some reason.
I have no clue why Is It happening.

I have managed to render 4k other projects and It didn’t had this weird artefacts.

Did you figure this out?