How can you tell that the lens - if it's even there - is missing in the other shot? Maybe it's not even there in the first shot, maybe it's just a weird lighting reflection from off-camera. If it is actually a lens part on there, maybe it's designed recessed so that you can't see it from the other angle in the second shot.
Find a third shot that proves or dis-proves the existence of the lens one way or the other...that will decide which shot needs to be changed.