Today Valve shipped a rather big update. Introducing a new Game-Mode, silent reloading and some details that might hint a pet system.
Along "Rush", silent-reloading and the new pet-related features we are currently mostly focusing on providing an update to make Rush playable with Vault.
We are aware of crashes when Vault is running while playing the new game-mode. Once Vault has been updated to a new version we will post another update to inform you!