Ohhhh, hey, you know what? Judging by the tileset and the terrain generator, it looks like that screen was taken from Grimm's Grotto. Correct?
I've never mentioned this to, er, ANYONE, but Grimm's is one of the dungeons (actually, I think the only dungeon) where I snuck in and deliberately tweaked the alg as a "throwback" to the alpha generator. It's been like that for a while.

I kinda wanted it to emulate the retro Ranked dungeon in a few ways that most "modern" dungeons wouldn't.
Now that monsters tend to bias towards corridors, lock-ins here will become more noticeable and frequent than before.
As mentioned by others, preparations can usually bust this problem (and purist runs obviously don't waste a gold investment), but if necessary I could bring the generation here in line with the rest of the game. It's just nostalgia, after all.

Oh, but as for most other dungeons, we've noticed some rather hilarious-looking generations and those will be tweaked to (hopefully) become a little more amusingly rare.
