It’s actually a copy of the original room, and there are invisible goblins synchronising all objects in the rooms so that it looks like the same room. They are also moving mannequins so that they match the movements of all the people in the other rooms.
To us it looks and feels like the same room with the same objecs and same people, so it doesn’t really matter.
But sometimes an admin might order that the goblins must not sync one specific room anymore. Then you start to notice differences depending on which door (=room) you actually use.