So I just had a weird experience during patrol on the Dreadnaught. I was fighting the Cabal in the Mausoleum when another player started waving and pointing inside one of the Cabal spawn points (when facing the Dantalion, the right most spawn cave). I rush over thinking there is a chest but when I get there, the player and someone else are *behind* the door in the back of the cave. Then they start running off to the right towards the Founts, and disappear after a few seconds as they go off into another area. Has anyone seen this/know how to get to this area?