Sketchup 2024 graphic issues in layout

Hi there,

anyone expieriencing graphic issues in layout? In Sketchup looks fine:

image

But in Layout not:

image

I thought it may be because of ambient occlusion, but it is not.
Trying to change the mode in Layout from raster to vector, Layout crashes.

And seems only to be in the shadow…

Am I right in assuming that you have a ‘thin’ floor finish object covering a floor slab or similar ?
What’s surprising is that in SU it looks ok; often we see this problem in SU directly & when it happens we just hide the floorslab Tag in the given viewport/tab…