Pinnacle Doryani Mysterious One Shot?

When facing Doryani in a Stone Citadel sometimes I just immediately die as soon as I trigger him and I have no idea what's causing it. His AI doesn't even register that I died and he loads in normally and starts doing all of his attacks after his dialog ends. This is driving me crazy and it's happened twice now making me waste fragments because GGG "didn't get around" to enabling multiple tries for pinnacle bosses yet! Anyone have any idea what it is or if it's a bug that others have encountered???

For context I am level 91 and I play a mana stacking Stormweaver which typically one shots every pinnacle boss (including Doryani whom I have killed multiple times already) and I very rarely die unless I get frozen twice in a row by one of those bs shades (because I don't have the Dream Fragments ring, woe is me, I know, lol). I have yet to encounter anything else in the game that's capable of one shotting me besides the Arbiter.

That is exactly what happened to me just 5 mins ago wtf man i was with 7k energy shield mana before life and low end graphics card like 1070 ti if its something like attack my card drop fps but now my card didnt register drops and i just immidietly die wtf from nothing i think that is bug and better ggg complete my quest and give me the fragments and exp back or just make 6 tries portals wtf for what are these fcking 6 portals make one death per map in some future league we softcore players doesen't need that fcking thing

Glad to know I am not the only one at least. I think I might stop playing for a bit until they fix these sorts of bugs because dying is just too damn punishing in this game and I don’t like having my time wasted by bugs.

I was just 1shot by his red laser beam that spreads out in a fan within 30sec of starting him, lvl91 character, 15k+ ES.

unreal. won't do another citadel until I hear something changes.