Stuck in boss arena after killing him (prisoners in maps)

Killed the Prisoner boss (the one with the ballistas in the arena) and after killing him it did not allow me to leave the arena and i couldnt complete the rest of the map. it was during a delirium and a summoning circle boss was alive earlier in the map (didnt want to waste time killing him because i realized the delirium doesnt stop when fighting them, probably another bug) but i believe its caused by killing him with the ballista rather then the other things. Rock and Stone.