Clipping plane include selection in rendered viewport glitch

Hi everyone!
Finally, I am trying out Rhino 8 here :slight_smile: it has a lot of potential!

Anyway, I ran into a viewport glitch and I dunno if it is on the graphics side or settings.

The clipping planes in the rendered viewport have a tendency to show everything clipped transparently when using Isolated selection include selected option. It seems this has something to do with shadows and the camera bubble shadow settings, but I cannot get it to work anyway. I am working close to W0, and fiddled with the settings, but still not getting rid of this.

Thanks for anything!
Petr