UPDATE:
Hey Dave R, let me know what you think about this:
I think I have solved this problem since the problem still persists since I read this thread about this topic.
I have the same problem as the user who posted the problem on this thread and what I've done is downloaded a previous graphics card update and the problem seems to have disappeared.
Here's the important part. If you do not section off using a section cut to get rid of geometry behind your sketchup scene camera view the geometry behind that same camera view in sketchup scene will still show up as a wireframe geometry and all geometry in front of your camera will still show up as normal. So in order to get rid of the wireframe geometry behind the camera in your sketchup scene, you need to download and install an older version of a graphics card update that works for you previously then when you switch into hybrid mode in a layout viewport of that sketchup scene you will not see the wireframe geometry showing up behind the camera in your sketchup scene anymore, however this is only provided that you have sectioned off the geometry behind your camera view using a sketchup section in place where you want to view your sketchup model. Just simply setting the "Position Camera" alone without a section does not work and in hybrid mode in layout you will still get unexpected geometry that is behind your camera view in sketchup showing in layout as wireframe lines in your viewport scene.
I have provided some attached files for everyone to see what I'm talking about and attached photos of what I see on my screen inside of layout incase you see something different on your end.
Please note that currently the update you are reading here with attached files is me telling what the problem was and now the minor problem which currently still is. Before in hybrid mode with a newer graphics update installed on my computer even with a section in place I would still see all geometry showing up behind camera view, now since I've downgraded my graphics driver update and once I section off geometry behind, I do not see the issue anymore in hybrid mode inside layout viewport, however I show in the files attached that if I simply set camera angle and do not section off geometry behind in sketchup scene I will still see hidden geometry showing up as wire frame so again the solution with an older graphics card update installed is to just section off geometry behind so that hybrid in layout works and shows you only what you want to see as you've set in your sketchup scene.
I would like to say that this problem has been solved now however I will update everyone once the SketchUp team member who is currently investigating this gets back to me with clarifying information or new updates on the problem.
View files below:
https://1drv.ms/u/s!AvMCuROdd4E1gRF66maMloczn2qP?e=Rgd0By
Cheers!