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Apple's notification bug didn't just affect disappearing messages; it cached the content of any notification for up to a month, turning a routine iOS behavior into an unintended gap.

Rachit Agarwal / Digital Trends

Deleting a message should mean it’s gone, right? Apparently, nobody told the iPhone’s notification database about that.

On April 22, 2026, Apple released a security update for iPhones and iPads, quietly patching a bug that allowed law enforcement, including the FBI, to recover messages that users thought they had deleted.

Signal

How did deleted messages end up being recoverable?

The reason: how iOS handled notification caching. When a message arrived, iOS triggered a notification, logging the content of the message into a database that was stored locally on the device (and stayed there for up to a month).

Even if the original message was deleted inside the app, it stayed in this database.…