https://www.pcgamer.com/fallout-76-player-glitches-inside-sealed-vault-63-begs-bethesda-not-to-ban-them/

Bethesda banned players who snuck into Fallout 76's 'dev room' last month—so it's no wonder one player that accidentally accessed the sealed Vault 63 this weekend was worried about the developer taking action against their account. So far they haven't been punished, and they managed to grab plenty of photos from inside the vault before fast travelling out.

The player, posting on McStaken on Reddit, said the game warped them into the vault during a Rad-Rat Horde event. Other players in the Reddit thread have been through the same thing, with the game spawning them inside the vault at the start of an event, and the only way to leave is to fast travel out. McStaken is worried about being banned, so they've submitted a support ticket to Bethesda telling the developer what happened.