Dunno what's going on, but I tried using the charged up hammer attacks (Quake/Super Quake), and both crash ZC as soon as the attack goes to fire off.
I've attached the quest I was messing around in when it crashed. You don't even have to be in the Gleeok room (not that you'd want to be there anyway. Its a deadly one) for it to crash, or hit an enemy with it. I just pounded at the ground on the starting screen and it crashed.
[956]Quake/Super Quake with Hammer Crashes ZC on Use
Fixed!