deadly map bosses bugged

hello

so i was doing a deadly map boss map

and i got the 2 bosses varlosh the ashen lord and avelyne the withered rose

when i got in .. i killed varlosh but avelyne kept dancing and i cant kill her nor i can leave the arena

i tried restarting the game - logging out and loggin in

nothing worked .. https://imgur.com/a/AIE260a

please help !!

this is the 2nd deadly boss map i lose like this .. its just sad

bug report reference number is 2,018,519,864

please check it out and do something about it