After space is fixed, maybe the root of the problem that is there now is the thing that happened at west feffoid nest when they came out: There are, say, 5 people trapped in the same room, and all of them once in a while try the exit door. But as there are several people trying at same time the instance gets "deadlocked" and nooe gets in.
Maybe Kim needs to tell the developers to get to the room and fix the entrance the same way they did when they fixed the feffoid nest(s). Though, as this is new players eager to get into game and there is nothing really else to do in the cave, you can't tell them "go hunt some normal feffoids and come back in 3 hours".
Maybe an emergenciy fix would be to give them one handgun each and relocate them out of the room directly to the start base (they could always get help to do the cave later if they want to). At least relocate them to clear the cave maybe it works better if the room (read: door) isn't crowded when new people arrive.