Clipping, this is an age-old problem with SketchUp, which just doesn’t seem to be going away anytime soon. It happens for various reasons: geometry too far from UCS, stray geometry that is way far out, etc.
I just wish this could be solved for once and for all. I have this happening on a model I’m busy with at the moment. UCS is fine, no stray geometry that is far out. In fact everything was working fine one minute to the next. I now have a situation where grouped geometry disappears when I enter it, I have various sub-groups, but everything is still well visible until that final double click to enter the particular group. To see what’s happening then I have to zoom all which turns the subject matter the size of half of your little finger nail - totally unworkable.
Drivers are up to date, hardware is rather well specced, plus it was working just fine from one minute to the next. Problem is I need to do some editing to the group in question and will probably not be able to do so now. A real PITA, especially as I’m using SU 2018 Pro and this is a paying job… I have no idea how to fix this so I can do the editing.
C’mon SketchUp, I give you my money every year to stay up to speed with the latest version, why is it that these kind of problems (clipping) cannot be solved?