Layout bug when switching to vector

We’re having the same issue - see attached screen grabs taken from Layout. Large areas of floor, which aren’t sectioned, are shown with a section fill in the vector render. Furniture sitting above the floor, also not sectioned, does not appear with section fill in the vector render. There is no logic to it!

I’ve read somewhere that this issue may be due to file size but we have deleted and purged the SketchUp file and can’t reduce the file size any further. We’ve moved the section plane on other models and successfully overcome the issue after multiple moves but that ‘trial and error’ approach is not acceptable generally and doesn’t work on this model.

Please help!

VECTOR:

RASTER:
image