NC sewer missing structure model and collisions

Found a spot in the NC sewers where a bit of ceiling is missing, showing a view into a partially-loaded world with other bits missing. You can jump up into that gap and there's no collision there either so you wind up in that weird quasi-worldspace. Very remeniscent of the old Bethesda game falling through the floor routine. Relaunched the game just to be on the safe side, no change. F2 and other shots attached.