Full Den Glich

There used to be a Full Den Glitch where you could go in to a full den. You know click on the see more den button and you could click on a full one. The game would let you in it. But now you cannot. It says the server is full. But you can still go to a friend's full server and play. I am usually jumping from server to server with all my firends. Because they are never on the same server.