It’s good to know simply flicking it back and forth solves it.
Flicking it back and forth in 2022 solves the misalignment for me too there - a does choosing another scene.
So I’ve had a closer look and I see what the issue is - I don’t know how you got there but again perhaps lots of zooming in and out or a certain action made it happen?
Basically your virtual camera that you are viewing your model through (the viewport) has ended up approx 5,764,348 miles from your model- just a mere 25x further than the Moon is from earth.
And then you are zoomed right in - quite a zoom lens!
3d software freak out for various reasons when this kind of thing happens and lots of 3D packages won’t even do parallel projection because it is a warped version of reality. I’d always assumed that the model itself loses it’s precision at that distance and you get the strangeness happen, but perhaps it is simply SketchUp’s ability to show things correctly that is the problem.
It almost sounds like it was related to a bug that users exploited to create elevations - I wonder if you somehow induced that by accident.