Wizard tower doesn't attack?
There's this glitch where if the unit it targets dies it won't shoot it's blast. Lets say there are 10 goblins. It hits all of them with one blast but when it targets a new unit and if that unit dies before it fires (from another towers attack) it stops halfway through. Then it happens again and again making the wizard tower obsolete because then sometimes it doesn't attack a single time afterward. This is the best I can explain it and I'm not sure if this happens with mortar also.