Mobile People News - Developers report continuing issues with iCloud services

For last several months there were increased number of developers reporting issues with iCloud sync APIs.

Mostly, this results in significant number of 503 errors accessing iCloud APIs.

Ok, there’s clearly an issue going on with iCloud sync right now affecting a lot of users across many different apps. What’s the best way to report this? Radar? I haven’t made any changes to my app since October and users have just recently started reporting sync failures.
— Becky Hansmeyer (@bhansmeyer) January 24, 2022

Some developers who created in-app status panels for iCloud status, see issues.

iCloud errors seem to have really increased over the last couple of days. Wonder how many devs have to add these for Apple to I don’t know fix the problems or at the very least publicly acknowledge them. https://t.co/KmukmZkYEu
— Paul Haddad (@tapbot_paul) January 21, 2022

Apple did not yet come back with resolutions or recommendations.

iCloud Drive returns a 503 error (service unavailable) since Nov. and it's affecting all apps that use iCloud Drive. @AppleSupport has not done anything about this and more AppleIDs are being affect.
The @GoodNotesApp is one of those: https://t.co/TwKO99symK @MacRumors @9to5mac
— RawMean MeanRaw (@MeanRaw) January 24, 2022

As of January 26 Apple’s System Status shows some issues as resolved.

Reference:

Recommendations

Developer:

Check iCloud API usage carefully. Have graceful fallbacks in place.

QA engineer:

Beware of iCloud issues, report inconsistent behavior to development team.

PM/DM:

Beware of potential issues with iCloud backend, prepare corresponding communications to users.

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