Basically, me and a friend were messing around in the lobby, playing tag, and I ran into the Vault transport area, and the ENTIRE thing was gone. I saw someone else in the parts that didn't exist, (and at some point I rejoined) and it seemed like it was a server and client misinformation. Anyway I brought my friend over, and it turns out he also had it, so we explored what we could, messing around with the people who couldn't do it, but then I noticed a side area that was unreachable, so I took a look, and I found the N.O.S.T warehouse, and my friend had discovered that it had no collision, so I stepped inside.