Boss in Act 4 bugged.

I played all the way through Singing Caverns on Whakapanu Island and died on first try against Diamora, Song Of Death (nearly had her lol)

After that I restarted the fight again but when she jumps over the edge to do her jump/water attacks she disappeared after first jump. So now I'm stuck in the boss arena without the boss...

Hopefully I don't need to replay entire cavern if I relog after posting this.

Edit Respawned at her checkpoint, hopefully the fight works this time.

Edit 2: Now she bugged out and got stuck in my minions so easy kill. That's nice and all but you need to check the mechanics on this fight. ;)