Shadow goes through static mesh

I cannot understand why it’s happening. When I disable cascaded shadows it’s okay, but scene is very dark. When I turn it on, it begins goes from every platform. How can I fix it?

I noticed you’re using multiple DirectionalLights (which are basically suns).
Have you tied adding a Skylight with only 1 Directional Light?

It’s a problem with my platforms. When I set another light source, like Point or Spotlight, shadows still goes through meshes.

I tried to set a SkyLight and DirectionalLight. The result didn’t become better :frowning: