Layout viewport style does not match sketchup scene

I am having a recurring problem. My LO viewport style does not match the corresponding SU scene style on my screen. The attached images show my SU scene and my LO viewport - immediatley after updating.

I do have hidden items in my SU scene

When I print or export PDF from LO the scene style is correct

My work around is to change the LO viewport from raster to vector and back to raster. This is a drag when I have a multi page document with many viewports as I have to do the workaround on each viewport

Am I doing something wrong or is this just a quirk of SU/LO. I appreciate any advice