Blood Priests - Interlude - Killed but ressurected and infinitely active

Blood Priests, Final bosses from Interlude 3 -
1. Fought bosses, focused and killed Zolin first.
2. Zolin cancelled his death animation. Started regen-ing ES.
3. Killed 2nd Priest.
4. Zolin still active, invincible. Can't kill.
5. Doryani is present as if the boss fight had concluded.

Was playing Poison.