BUG: Stone Citadel , 0 monster remaing

i am at stone citadel , lvl 80.
the map shown 0 monster remaining, but map is NOT complete

I do remember see TWO boss icon shown on the map.
Suspecting the Atlas skill twin threat is causing the BUG

Please look into this

BOSS was Doryani

I just returned to the game after an hour, and it shows citadel failed

It took a player dozen of hours to find a cidadel, and thru no fault of my own, its wiped.

just wiped