I second the earlier request that the air-gap also remove power from the canopy, when the switch boxes are so wired.
Also, I suggest that when the canopy module and switch become unpaired, that the notification be something less alarming. This morning, I awoke to the bedroom Google Hub doing its restart chime, an indication that we had another power outage. As the fog cleared I noticed the fan light blinking on and off. After a couple of minutes, I concluded they were not going to sync. After a bit of fumbling, I was eventually able to pull the air-gap, and reset the switch. The switch reset, but did not immediately sync up. I was about to give up, and flipped the breaker to reset the canopy module too, when the light went out. Testing, the buttons were now in sync with canopy.
Fortunately, my wife had already left for work, and it was relatively light. Had this happened at night, especially if my wife were home alone, I would have been in big trouble. Trying to explain to my wife how to pull the air-gap would not have gone well. Even worse would be if I needed to tell her to open the breaker box. That would be the end of automation play things.
Some indication less likely to incur spousal wrath, such as blinking the switch LEDs, I think would be preferable.