Necromancer skills

Hello, could someone tell me if there is a bug in the necromancer skills.? until yesterday I was playing normally using the blood siphon as my primary weapon, this on Torment 1 difficulty. Now I’m changing to above difficulties and I noticed that the skill is no longer offering me healing, I do a lot of damage to enemies, but I’m not receiving healing in exchange. can anybody help me?

Did you change any gear, like swapping to use Death’s Bargain and/or Soulsmasher?