I think the bot is missing an id which makes it consider the hole as unwalkable. This is really unfortunate though since monsters can walk on top of the hole without falling down so if you just stand next to it and try to step into it with targeting off you'll get stuck as the monster will be blocking the path and if-stuck targeting won't trigger since you're using lua to walk. There's a few similar holes on Goroma. I wouldn't count on this ever getting fixed by Darkstar.