Atziri 2nd Round bug

Went through all that effort to finally fight Atziri again. The fight wasn't hard at this point, and I can one-phase her. Then on the second round, at less than 5% HP remaining, she turned invincible while blood balls and red lightning filled the arena. She's just standing there. Relogging in didn't work, and nothing else seemed to do the job. So I died and can't reenter the temple. Now I have to go through at least 12 maps to try again with no guarantee that this won't happen there too.