Necromancer's mana regen.

Necromancer's mana regen equals it's "Magic Power score", starting from 2 points, then 3 on level 3 and 4 points on level 5.
When you reach level 3 you may choose "Recovery(1) talent, that increases you mana regen by 1, so on level 3 with 3 points of "Magic Power score" and "Recovery(1)" Necromancers starts to regen 4 mana per turn. That's ok.

The bug is that when you reach level 5 with that Necromancer, he still has only 4 mana regen, so 4th point of "Magic Power score" is not working for him, or "Recovery(1)" stops working.

[Legulysse]

Hi ! Your Magic Power Score will improve either your mana regen or your mana max at each level.
Level 2 : +mana max
Level 3 : +regen
Level 4 : +mana max
So the last level has only improved your max mana.
On our current build, we have 3 mana/turn and 12 mana max at PowerScore 4, not sure if those values where introduced in your build.

Oh, I see now.
Thanks for answer!