Jaanus Kase (Mastodon):

We deployed direct silent CloudKit notifications in Tact in late 2024. They proved to be too unreliable to use in a messaging app like Tact: notifications arrived late or not at all. To be fair, this is within the bounds of the Apple SDK contract, which does say that the delivery of silent notifications is on a best-effort basis, and you can expect a lower service level than with visible notifications.

Since Tact is a messaging app where users do expect to be notified of new messages reasonably fast, Tact in May 2026 switched to visible notifications delivered from CloudKit. Those do work reliably and fast, but the user experience is not as fast as it could be. CloudKit has several bugs in this area, and the bugs compound.

So this is simply an inventory of open bugs filed to Apple around the area of CloudKit, notifications, and the related developer experience, as of May 2026.

Previously:

• Leaving CloudKit
• CloudKit Problems With iOS 26.4
• CloudKit Throttles and Debugging

Bug CloudKit iCloud iOS iOS 26 Mac macOS Tahoe 26 Programming

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