When I converted my system from Ra2 to Ra3, I had one out of 5 keypads not take programming. It worked on Ra2 but did not respond on 3. I deleted the device in programming, factory reset the keypad, and redid programming. That worked and hadn't had any problems. Until yesterday LOL. Upgraded from 21.8 to 22.0 and the keypad is no longer responding.

I thought there was something about certain devices that are older not working with Ra3. I'm just not sure of the specifics.