After you'd gotten into the sewer, I'm assuming you were able to get to the next room, correct? Have you removed the manhole cover in that next room? Asking because that's what's supposed to happen after that second manhole cover is removed—the rat comes and steals your broom, but it's no longer needed at that point.
But yes, if he steals the broom
before you're able to remove the cover, then yeah, I agree that's a problem. =o) Let us know.