I have 20 ZigBee switches, but one of them started to not send the power events. It sends one with a “0” after the switch is one, but nothing else, even though it’s actually turning on a light with a bulb in it.
I tried to remove and readd it to the system, but no luck.
If the switch has an airgap switch (on the front next to the LED), cycle it to completely kill and restore power to it and then try again. If there’s no airgap switch, then trip the breaker it’s on. Sounds like you may have a switch going bad, and power cycling may resolve the issue temporarily.