Outpost Roomba Phase through Walls?

Was farming some outpost when I seen this little robot cleaning the floors with a happy face. Thought it would be funny if I stuck some claymores on the little guy and get a kill, instead the bot went and phased through the wall next to the pinwheel entrance where there is a bathroom next to the keycard input. (I dont remember the name of the entrance, Flight control maybe?) Another time, was just watching the little cleaning bot and this guy followed us down the same pinwheel hallway and cleared the elevator shaft vertically. Its hilarious to watch but keep your eyes on him, might get a laugh or two. (Also the claymores phase through the walls with him and yes I got a guy on the other side of the wall because of that.)