Tornado from a Bahlak, the Sky Seer visual never disappearing

Like title says, a Bahlak, the Sky Seer boss in Cenotes map did their tornado attack, boss died after a while (after hiding inside the tornado flinging spells. I couldnt see what was going on, so it took a bit for meteors to kill it off from range). Tornado is still up and running visually way after the boss is dead. It doesnt deal damage anymore but blocks off complete visibility.