Cause by that time it starts to drag out.Why is that different from the other?locks
You are already expecting to see the treasure when you get to that room because everyone is talking about how the "treasure is right there" and previous dungeons have taught you as well that when you get to the final room there is not much left. But instead you see a lock which you need to unlock by going somewhere else. You do that and you are greeted with another lock, you do that and there's yet another lock ! Thankfully the later dungeons are generally better in this regards.