The quest "A Taste of Power" does not work

Hi. In season softcore. I have the quest “A taste of Power”, and the objective to kill the butcher.
I was playing with a friend, and he started the quest before me, and I got in to the room with the burning floor, just as he killed the butcher. And now I can’t get him to spawn for me at all. I have restarted the whole computer, and reset all dungeons. But when I enter the room, there is nothing there. It’s rather annoying to not be able to continue in the season questline. Is there a way for me to fix this, or dose a GM need to reseet the quest or someting?

Im in the same exact boat on ps5. Joined the battle late and it didnt count as completed. Now im stuck with an empty arena

It seems to be fixed now. I tested today, and now the butcher spawned.