Can't AirPrint to Canon MG5320

I have a Canon MG5320 - AirPrint worked fine from all four IOS devices (2 iPhones 6 and 2 iPad Air) until all four devices were updated to IOS 8.3. Now none of the four can find the printer.

I checked and the firmware is the latest version 2.02.0 - the devices are all on the same WiFi network.

I have no problem printing via WiFi from my MacBook to this same printer -- the MackBook is running 10.10.3

Any ideas? I tried Canon support and they ran me through all the things I had already tried without success