Okay. I found the problem. The shadow density was set to 80% that’s why some polygons get light. But I thought I can make the shadows less intense with this option.
I got a solution. When I go to the shader->effector->strength and change it from 100% to 99,9999% the shadow disappears. It’s so strange. If you want to find another solution here is the link to my project file:
So I tried it on two diffrent pc’s with the latest version but got the same result. Then I disable the Shader for the Cloner and the shadow disappears from the main object. I don’t get it ….