Exploring the broken valley at level 10, my Level 1 Charm Spell seems to randomly stop working... I'm not trying to charm an enemy over the level 13 limit, and am not getting a message about the spell being resisted. I fire it, see a particle effect around my character, but no effects are displayed on my targeted enemy and no mana is deducted from my pool, its like a misfire. The ability doesn't enter its cool-down state either, I can fire it again and again with no effect or penalty...
Is there something I am overlooking?