Derelict Mansion Boss encounter buged (POE2)

I died in the boss room of Derelict Mansion and the Boss didnt reset. There was an abyss in the same room. After respawn the encounter didnt restart. I tried to reset the dungeon. then I did start another map to reset it. I didnt know, that the first map fails after switching and now I cant fight the Derelict Masion Boss at all. Charakter name: Rajakel lvl 84 Witch