Imported .skp drawing disappears with hybrid and vector views

Why is my imported drawing disappearing when I switch to hybrid or vector? In addition, the shading and hatching is also missing, except in a small area of the drawing.

The two drawings below show both versions - raster and hybrid (with missing lines)

Sketchup '21, Mac Catalina 10.15.6

Can you share the LO file so we can see what you are working with?

The problem started when I was working in Sketchup 2019. I installed v. '21, opened the LO file, and still had the problem until I saved the original .skp file to v. '21. Now that both the LO file and .skp file are updated, the problem seems to have gone away.