Looking at ipsw diffs, guess iOS 26.4 introduced some safety protection that discards notification from untracked APNs token, preventing CloudKit notifications from getting to the app 😂
@khaost how does that turn into third-party applications not syncing for iOS apps? Are the tokens these are using not valid?
@rwitherspoon CloudKit subscription apparently have notification comes in from a special APNs token, that gets dropped by UNC in the previous logic since UNC does not track that token.