I am not using it with a deathless artifact and if i take off the bloodletter I can refill the hp, putting the mod back on causes the hp to be set to 1 again. I can’t find any patch notes stating this change and there is no text on the class mod to lead me to believe this is correct functionality.
There’s a Moze skill in the Shield of Retribution tree called Thin Red Line. 5 points in that skill will put you at 1 health max.
Another possibility is wearing a front loader and having 2 points in Thin Red Line.
Are you doing either of these?
Thin red line was it, thanks for letting me know