Spells: Drunken Casting

[Vonyor]

I'm not sure what is going on, but when my character gets drunk to the point that my camera is forced into first person he seems to stop using mana. I spammed nukes and buffs the entire time I was drunk and my mana never dropped below 98% even without meditating.

I think the game is failing the register the drop in mana, despite having about 600 mana when drunk it thinks I have my full 1.1k and subtracts from there or something. I really have no idea.