Undying Hate Passive "Creature of Magic" does not work

I am using an Undying Hate jewel with "Creature of Magic" allocated. I am not seeing the "Damage Taken Recouped as Mana" stat on my character screen increase at all no matter how many tribute nodes I allocate. Unknown if the restoring mana on kill portion of the jewel functions at this time.

Update: This turns out to just be a tooltip issue, I'm going to guess it has something to do with varying amounts of tribute so it isn't accurately portrayed on the character stat screen.

Same thing, using it on abyssal lich
Nothing changes