Crowbell stuck when dealing too much damage

Bug Report ID: #331223150

Crowbell doesn't pick up the bell any longer when he has taken too much damage during his "invulnerability phase".

Seems like I pushed him below a certain threshold, so he keeps attacking me and does not proceed to the final arena. And anyone who wondered if it was possible to kill him with enough damage, he becomes 100% invulnerable at 5%hp. Stuck there then, gotta reset and deal less damage :D