I completed the game with the Railroad ending and now when I go back in to use the elevator in the Mass Fusion building, I get teleported to this weird limbo area where I'm on a girder halfway up the entirety of the building. If I move an inch I fall to my death so I have to reload whatever save I have and remember not to use the elevator. It's not game breaking by any stretch, but it is odd and I thought I'd see if anyone who completed the game with a separate ending got something different. To be clear, I also helped the Institute get the reactor that was in the Mass Fusion Building and then chose the Railroad in the end.