Shakari

So I have tried to kill Shakari multiple times and she we not die. When she gets to 1/3 health left she becomes undamagable even when the shield is removed. I can just stand there for 5 min and not do any damage. I assume this is a new bug?

I had the same thing. It looks like something at 1/3rd health she doesnt go into the phase where she spawns adds/minions. I kept walking at the edge of the room and at some point it triggered the add/minion phase and i was able to do damage again.