Boss arena bug

file:///C:/Users/chris/OneDrive/Pictures/Rare%20mob%20bugged%20into%20boss%20arena%20cant%20complete%20map.PNG

Hopefully that image can be opened, but essentially, went and killed the boss in the Vaal Foundry map, and a rare with essences spawned in the boss arena, so either i opened it mid boss fight or just killed it after. Unfortunately it is now trapped inside the molten wave and i cant break it out of its essence prison. and i cant complete the map either which is feels bad moment...