SandEngineer

Thirded. I'm experiencing the exact same situation on GOG (V2.0.0.0030). Although my Maia is bugged out with permanently 0hp thanks to the Neriscyrlas beam attack bug, not sure if that affects anything.

Exact same issue here. The Dragon does the purple beam attack, Maia's HP is reduced to 0 but does not die, or take any more damage. I finished the DLC and got back onboard my ship, swapped her out and then back into my party, still had the issue. Even after reloading and all that jazz, she's still stuck in a zombie state. Can verify that nothing seems to reset Maia to normality; neither resting, removing & re-adding to party, nor saving and loading. Anyone tried a save editor or similar? Also, interestingly the Life in Death healing aura from the Blackened Plate Armor deals NaN damage to Maia every tick now according to the combat log and the floating combat text says -2 147 483 648.

Just want to chime in that the "Maia immortal at 0hp"-thing happened to me as well but during the first fight with The Messenger. It seemed to happen when he does that beam attack, though the same did not happen to my main character when he was subjected to it. Maia is using Blightheart and I saw it proc around the same time, not sure if that's related. Update: Exact same thing happened in the final fight. If Maia dies to the beam she apparently becomes an immortal zombie forever. Also experienced both that Neriscyrlas turned untargetable and immobile but still able to fight as well as getting stuck in the air, of which only the latter resolved itself.