Title.
Player pets now have baseline % non-Physical damage resists, scaling from 1% at level 1 to 80% by level 80. Most pet % Resist bonuses in gear and Devotions have been removed and pet base resists have been normalized across the game
I think this is because of the removal of pet resistances in general. I saw something similar on one of the nodes of Wolverine constellation.
Ok but its now an empty slot so its confusing why there is no other stat for pets in it.