it seems the latest patch has changed kangaxx's powers, he can now imprison my wizard eye. also, seems like his imprisonment spells are now finite? i'm not sure about whether it is infinite or not, i killed him too quick and did not wait to find out.

Wizard eyes have been changed. They used to be invincible, but now they have been made easy to kill. I think this was to stop people sending one in and then hammering the monsters while they tried to kill the invincible eye.