I was just playing the game with an all XBOX crew and when we were fighting marmalade, the game refused to register him as dead. we got him down to zero health points when we didn't have the lyre sphere Activated. No matter how many additional times it was activated, Marmalade was invincible. (I would joke about him absorbing enough Aleph to become a deity but that's ridiculous) I ended up having to continuously suicide to end the game which I recognize is something that runs the game. Seriously though, We were stuck, we couldn't advance and I didn't want a penalty ban from leaving a mission I couldn't complete