I have had multiple HS220 installed throughout the house installed since August. Today, one of the lights stopped responding. It would not turn odd not turn on. The light on the switch was off (the light was off too). I restarted and then reset the switch to factory settings, but I am unable to add the device. The lights keeps turning on now on its own and increases the light to the max and keeps flickering. Firwmware is current.