Planar Prison Problem, Say that three times fast Options

[OldManPaco]

So there we are beating on the huntress waiting for her immunities to where off and that Tagget guy turns red on me about half way though the battle. He attacks and dies when Viconia sneezes on him. I miss his little dialogue but no big deal right?

I go on and clear out the area but when I get to Raelis she is also red. She says her dialogue about opening a portal but attacks me right afterwords. So I'm stuck in the prison with a bunch of dead actors. Good times.

I have done the whole level twice and the huntress battle three times with the same results. Every time Tagget turns red and attacks me while I'm waiting for the huntress's Immunity spell to wear off. This is after all the other minions are dead and I have someone beating on the huntress to keep her occupied while the rest of the group stands around scratching their asses. I am assuming Tagget is causing Raelis to also turn red.

So is this a 'feature' - is there a time limit to kill the huntress or am I just hosed?