I had never encounterd this problem until recently , once in a while but its been happening more and more often now , almost each day, it won't let me use my fire spell altho i have enough mana to cast it. Sometimes it wont let me use my whip , i know for a fact that the issue is not the mana since when the glitch occurs with the whip for instance i can casst the fire while my fire costs me more mana so the issuse isent the mana and is a bug. reporting it so it can be looked into as its been doin it more often now days.