I'm not sure if this has been caught yet but there's a bug with the Cambion Drift tunnels for the Isolation vaults. Sometimes when you transfer out you kind of... Glitch through the floor and end up freefalling infinitely. You dont get the outof bounds respawn so far the only fix ive found is to transfer into my frame, activate archwing and fly through the floor of the map somewhere the dungeon DOESN'T occupy. You fly into the dungeon and A you bounce off the underside and B it registers you as being inside and de-activates archwing so you're back to freefalling. Hope this helps anyway.