Yes, I am also having this issue. I'm downloading records from CloudKit. It works fine on Wifi but not on mobile data. I have read about the qualityofservice solution on StackOverflow: https://stackoverflow.com/questions/32493698/ios-9-cloudkit-query-does-not-return-anything-while-connected-to-cellular-netwo. But this does not work for me either. Tell me if you have resolved thanks.
chrisfromlondon
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I'm still having this issue in 2021. Did anybody manage to resolve? I have posted my comment on Stack here:
https://stackoverflow.com/questions/32493698/ios-9-cloudkit-query-does-not-return-anything-while-connected-to-cellular-netwo
I have the same issue. Has anyone managed to resolve this. My comment posted here on Stack https://stackoverflow.com/questions/32493698/ios-9-cloudkit-query-does-not-return-anything-while-connected-to-cellular-netwo
I posted an image of where the switch can be found here: https://stackoverflow.com/questions/32493698/ios-9-cloudkit-query-does-not-return-anything-while-connected-to-cellular-netwo/66213337#66213337
iCloud sync over celluar network must be ON. - is what resolved this for me.
Settings app - iCloud - iCloud Drive - Use Celluar Data - ON
The switch for this is quite hard to find though. On ios 14.1 go to the bottom of the mobile data page.