Spectre Soul Boost bugged ?
I just completed a master mode "Blades" quest.
The final one with Mephisto as boss.
I activated a Spectre Soul Boost just before fignthing Red Deadpool, and I could still see him regenerate health (green numbers, and his bar gooing back and forth between damage and regeneration) and during the last fight, after loosing a character to Mephisto (the devil having 1800 HP at the end), I started the next fight with a regeneration message on Mephisto, but even if the red disc was present, he was neither regenerating nor loosing health. (no red numbers, no green numbers, but with a starting health at 1800, he should have been dead and a few seconds)