Skulltown clipping & Wallhacks

As of today, if you play as Alter in the Skulltown Map in TDM you can use her portals to clip INTO the building with the hallway, a place unaccesible to other legends. Even though you can't shoot anyone on the other side of the walls, you can look in specific directions for literal wallhacks. I am unaware whether this is game mode specific, map specific, or platform specific (I was on pc).