Doryani switch to phase 2 issue

Got to a stone Citadel and took Doryani's life all the way to the end. Was still attacking me even though I took all of their life... Basically making them immortal and took EASILY 10-15 seconds to start phase 2. Unkillable, can't stun or freeze. Unsure if curses will still work.

Same just happened to me, lost several divs of value and an hour of setup time just because I was waiting for the phase to switch after bringing to zero life.

Yeah, same issue here. Normally he phase switches fine, but this time he was immortal with 0 health and did like 3 or 4 different attacks that you need to dodge etc without switching phase. He finally switched after killing me.