Stuck in main story act9 boss bug

i killed the act 9 boss during "Recurring nightmare" quest, but died at the same time as him.

back to checkpoint, i go back to the boss arena, no warp, nothing, it just says "talk to lily", no way out

bug report reference number is 4 166 500 229

i know in hardcore it would not have been a problem but in softcore it is.

thank you, have a nice day