Unlimited Mana as Witch

Hi,

I noticed that i never use potion of mana and that my regeneration of mana is almost instant. I can spam my spell without having to care about mana. When i look at gameplay video, it seems odd so i suspect a bug but i don't have any clue of how.. for me it is like that since the begining so i don't know if its normal of no.

I have 12.7 mana/s of regeneration, that seem a lot, especially if i didn't take any passive skills that give me some.

The game is fire by the way.

Good day to you.