Thanks Masamune, good catch, and your read was right. The portal itself sits where it always did, partway down the ladder, but the game was treating its trigger zone as reaching a full body height above that point. That put the top of the zone level with the floor at the top of the ladder, so just walking past the ladder warped you to Sleepy Dungeon III. The trigger zone now only reaches half that far up, so standing or hunting on that floor no longer sends you anywhere, and climbing down the ladder still takes you to Sleepy Dungeon III as before. The same correction applies to every walk-in portal of this kind. LIVE now (refresh the game to pick it up).