Agreed, it seemed like about half of the times the contestants tried every step combination but no door opens. Its only when they repeat the combination is when the door opens. And then there were a couple of runs where a couple of teams got screwed over by this room (The Golden Cup of Belshazzar, the Lost Logbooks of Magellan). Although Medusa's Lair was another broken room too.
The ladders should've never been removed from the Jester's Court in season three.