Here is another experiment:
In setup screen I enabled suspension-view. (car: Fz5)
Then moved the "ride height" at rear between maximum and minium and watched the rear camber.
(camber changes with ride height)
One would expect that camber is always the same, but it is not. There can be differences of +-0,5°
I think maybe it is because the garage runs the same physics as on track:
When the suspension geometry gets changed, the tires on the ground move or deform.
But because there is some friction between tires/ground, sometimes the tires slide or deform slightly different (depending how much/fast suspension geometry changes) and then the displayed values are slightly off.
You can even "hop" the car around in the garage like a low-rider until it is not centered in screen anymore. If you "hop" it even harder then the suspension breaks..and the damage does not get repaired if you change setup. See screenshot, Fz5 with unchangable default setup that is way too low at rear because of broken suspension. and not centered because of "hopping."