Cuachic Vault blood priests wont die

Bug Report ID: #3694617823

After killing the blood priests, Doriany showed up but not the hooded one.
There was some dialogue and it said talk to the hooded one, as he was not there i went back to town, but there was no special dialogue, so i went back into the vault and now the male blood priest was at zero life, but energy shield regenerating and attack me. I killed the ES, but he appeared to be unkillable.
I am stuck at quest progress now. Campaign wont finish.