Dread Emperor Doom is bugged

Gk_Hood12

Context: I was fighting the first phase with 7* Sentry. Doom got down to 0 will charges in the middle of a special attack after I hit him.

I used heavy against him to punish his sp1 right before he was about to go to his cutscene. The heavy connected and he immediately died.

I was shocked from this and finished the fight as you imagined super early. Even with this luck, I didn't complete the quest and restarted from the start cause i actually want to do the fight as normal and enjoy all the way through it