{"id":51454,"date":"2026-04-01T14:33:43","date_gmt":"2026-04-01T18:33:43","guid":{"rendered":"https:\/\/mjtsai.com\/blog\/?p=51454"},"modified":"2026-04-10T13:57:02","modified_gmt":"2026-04-10T17:57:02","slug":"cloudkit-problems-with-ios-26-4","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2026\/04\/01\/cloudkit-problems-with-ios-26-4\/","title":{"rendered":"CloudKit Problems With iOS 26.4"},"content":{"rendered":"

Lukas Kubanek<\/a>:<\/p>\n

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Looks like Apple broke CloudKit<\/a> sync in OS 26.4. Remote notifications don’t seem to arrive, so no updates unless the app is relaunched.<\/p>\n<\/blockquote>\n\n

Sean Heber<\/a>:<\/p>\n

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There are so many annoying limits and throttles when dealing with iCloud\/CloudKit. Now I ran into one where the subscriptions that let you know when content changed are also throttled and limited. From what I’m reading, I might be in push-notification-jail for 24 hours now because I triggered a ton of changes during a test.<\/p>\n

Makes it a tad hard to know when I broke something vs. when iCloud just decides to stop sending me stuff for a while.<\/p>\n<\/blockquote>\n\n

Sean Heber<\/a>:<\/p>\n

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Has anyone had a CKSubscription<\/code> just… stop? It’s a zone change subscription. It’s supposed to generate an invisible push so I can refresh things. This used to work. Then early yesterday it didn’t work anymore. I’ve tried everything I can think of including reverting all code entirely back to a state from a few days ago when I know<\/em> it worked. But it still doesn’t work. I’ve rebooted things. I’ve reinstalled things. It’s been 27ish hours now since I last saw it work.<\/p>\n<\/blockquote>\n\n

Steve Troughton-Smith<\/a>:<\/p>\n

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Looks like the CloudKit sync issue in *OS 26.4 is real (I can repro with all of my apps), and has the very distinct potential to lead to catastrophic data loss and\/or sync conflicts across effectively all apps. Apps only receive changes from the cloud after being quit and relaunched.<\/p>\n<\/blockquote>\n\n

Amy Worrall<\/a>:<\/p>\n

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Anyone know if the iOS 26.5 beta fixes the CloudKit subscriptions not working bug from 26.4?<\/p>\n<\/blockquote>\n\n

Ged Maheux<\/a>:<\/p>\n

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It’s hilarious that the iOS 26.5 beta release notes make no mention that they fixed this massive regression with iCloud push sync Apple broke in 26.4.<\/p>\n<\/blockquote>\n\n

It seems serious enough to warrant a 26.4.1 update.<\/p>\n\n

Previously:<\/p>\n