I had posted another thread in another spot with no replies about this. On the facebook KPA site 2 guys chimed in and said that happens to them while connected to RM.
I have already replaced my initial unit because it froze up too but now it happened with the new rig. All current FW/Software on lap top and KPA head. Works fine not connected.
Just wondering how frequent this happens and if there might be a better cable to makes it more stable? Good news is I do not need to keep it connected to play live.