John and Jane 's I pads are not printing properly ~~~ update to the latest IOS

after a lot restart /and power off, get Jane's iPad working printing via wireless to a MFC

John's one is half working, it will not print email, but it can manually print pdf

its late in the afternoon. in despair. I did a manual check on John's iPad for IOS update; there is a new one 18.5 even if it is set to auto-update

then updating both devices, all good

here is google AI has to say

 If Brother Mobile Connect isn't working on your iPad, ensure both your iPad and the Brother printer are on the same network and have the latest version of the app. If that doesn't fix it, try restarting both your iPad and printer, and verify the printer's wireless settings. You might also need to reset the printer's network settings. 

Troubleshooting Steps:

1. 1. Verify Network Connection:

   • Make sure your iPad and Brother printer are connected to the same Wi-Fi network. 
   • If your printer isn't connecting to the Wi-Fi, try connecting it using WPS or manually entering the network credentials. 
2. 2. Update Apps and Firmware:

   • Ensure you have the latest version of the Brother Mobile Connect app installed on your iPad. 
   • Check for and update the printer's firmware to the latest version, if available. 
3. 3. Restart Devices:

   • Restart both your iPad and the Brother printer. 
   • Consider restarting your Wi-Fi router/access point as well. 
4. 4. Reset Network Settings:

   • If the problem persists, you may need to reset the Brother printer's network settings. This can be done through the printer's control panel or by consulting the user manual. 
   • Also, reset your iPad's network settings by going to Settings > General > Transfer or Reset iPad > Reset > Reset Network Settings. 
5. 5. Check for Interference:

   • If possible, move your printer closer to the Wi-Fi router to improve the signal strength. 
   • Ensure there are no other devices or objects interfering with the Wi-Fi signal. 
6. 6. Contact Support:

   • If you've tried all the troubleshooting steps and the issue persists, contact Brother support for further assistance