Bug Culling group not using static occlusion

hi there,
i made a small implementation deactivating yellow spheres when they are outside of 40m radius. This is using Culling group and they are static. So I hoped that occluded spheres are also deactived but this is not the case.
According to documentation static occlusion is taken into account. Any Idee how to solve this?

here is a video showing the problem: Sphere 2 need s to be deactived since it is occluded:

 

I believe that the scene Camera will generally also affect occlusion, so you can't "watch" your occludees in the scene because then they'll always be seen by the scene Camera, at least last I checked.

 

Thanks! I will check that