Ive just recently noticed a weird bug that is occuring with some of my spells on my mage character. It seems that for al the holdclick spells (flames, healing, healing hands etc.) i seem to be able to cast them infinitely. They still use up magicka like normal but when my magicka hits zero they dont stop casting. I just spent 10 minutes healing my companion while she stood on a flame trap with magicka constantly on 0 and i levelled up like 5 levels in restoration. Obviously this benefits my character but it ruins the balance of the game and i feel its just cheating. I dont know what has caused this, but i have installed a few mods but this bug only occured recently (well after i installed the mods).

The mods i am using are mostly texture/performace with a couple game-play changing mods. Anyway here they are:
Deadly Dragons
PISE - Improved Skyrim Experience
Realistic lighting (Without post-processing)
Enhanced night
Realistic water textures
Serious HD retexture landscape
HD Skyrim
Vurts flora overhaul
SkyUI

Any ideas on what has casued this bug or how to fix it?

Thanks in advance

To me this smells a little of some attribute value getting messed up - it could happen if you had a temporary effect acting on something which a gameplay mod has then altered perhaps. Try getting a blessing to clear temporary effects. If it still happens check back through save games and you might find when it started occuring.

Turned out to be a bbug with an enchanted amulet i was wearing (fortified magicka 6 points) no idea why it had this effect. Thanks for the help tho