The black Crow bugged

Hello,


i don't know why but that specific boss is never going phase two where he pick up his bell and at some point he is invulnerable, i can't kill him i need to let him kill me or quit the map, even if i die i can't kill him the next time, last time i thought it was delirium but no, it's this specific boss.

he is not damagable, dunno if it's the correct term, but when i use skill on it, i can electrocute him, but he is still moving and attacking, i can maim hit, poison doesn't hit and lost focus from witch hunter, witchbane isn't moving neither down or up, if it's help you to understand what is happening