The problem disappears when I switch to nanite on each mesh. But this is not the solution. After switching to nanite, I have strange ‘floating’ lighting, as if light is being generated in certain places. I don’t remember having this problem in 5.4. I only noticed it after the 5.4.1 hotfix.
I would check if this problem occurs in 5.4, but unfortunately this version can no longer be installed without a hotfix 
Edit: Unfortunately, the problem also occurs on 5.4 without the hotfix 5.4.1