There's a bug where I can't go down this specific ladder in the Dungeon area. Even though the ladder before this one works.Pressing the down arrow key only results in Maya looping the descent animation without going anywhere.
On second glance, it seems like the ladder is blocked from beneath. It was just difficult to see because it's on top of the gate xD
You're right, it is visually confusing. I'll change the display order so that the closed gates render on top of the ladder.