Foliage Shadow Distance following Camera?

Hi there,

I started a new ThirdPerson Project. Created a Terrain and put in some Grass that i downloaded from the Marketplace (free “MegascansMeadow Pack”)

Now i do have Problems with Shadows. You can see in this Video. The foliage shadow is following the Camera Distance. I couldnt find any way to solve that.
Does anyone about this?

In foliage “cast Shadows” is checked.
Cull Distance doesnt solve the Problem as well…

It should have nothing to do with shadows.
cHeck volumetric fog, and post process.

thanks for ur response
somehow i made it work to be close to not recognizable. But im not sure anymore what exactly solved it. i guess its been tweaking lighting values…