I just confirmed it’s working. The character sheet just doesn’t have a description for flat health regen but it is being applied to your minions.
" Blood Wraiths, Putrid Wraiths and Flame Wraiths no longer decay more slowly than regular Wraiths."
This was pulled from our patch notes from Sands of Majasa 0.8.3.
I don’t believe we lowered base regen to normal Wraith. Have you experienced their regen to match one of the ones listed above?
I’ll look into normal Wraiths and see if it was intentional to also homogenize their regen with the others.