the Derelict Mansion

something bugs with this map from time to time
makes it so when you enter the boss arena, the bosses do not activate. it could possibly be because of the way delirium interacts with bosses at times, and the dude is stuck playing the piano instead of the delirium effect having him do an attack, or something like that

thats my theory. but ya it doesn't matter what you do nothing will activate the boss and i guess its just bricked