@avuko
Oh, but it's even worse than that. From TFA:

Authorities have turned to push notifications more broadly as an investigative strategy too; in June 404 Media reported Apple gave governments data on thousands of push notifications. Those were legal demands made to Apple, while the Prairieland case was about data from a device authorities had physical access to.

This suggests that your #notifications are sent home to #Apple. Why is that necessary?

I have further questions:

• Why, and for whose benefit, were notifications stored on the phone after the #Signal app had been removed? They were useless to the other of the phone.
• How much of this vulnerability is shared with Android phones?