Very dark Shadows inside Foilage and Quixel Objects

Dear Unrealers and Unrulers,

I have a Shadow Issue that i struggle to resolve. In my viewport every Shadow looks normal but when I render 1 frame via the Movie Render Queue i have a dark shadow glow around my Objects. Or a curtain made out of shadows. I use a skysphere as my lightsource and some Megascan-Objects.
Do you have an idea what causes this? Perhaps from object settings, something with Nanite or a render-settings problem? Earlier i had the same issue in the viewport when loading the Unreal-Engine-File but a reaload fixed it. Sadly when i start the rendering it reappears.
Thanks in Advance.