Parts just seem to not be rendering. Physics-wise, they are there, and they are interacting with Dynamic Lighting, but they just aren’t appearing.
This has been happening for a while, and I would have thought the issue would have been fixed by now…

If you look at the above picture, you can see the shadows where parts are supposed to be, but they just aren’t there for some reason…
EDIT: It doesn’t always do this, but it happens sometimes. Something similar happens with weapons sometimes, where you unequip them, and they unequip, but they appear to be floating where you unequipped them at, even though they aren’t physically there.