Today's lesson in security.
Dead drop, paper, fire. Stuff sent into the ether regardless of how is just waiting for stuff like this.
Anything else is just "security theater" IMHO.
I wish I could say I was surprised about this report. But, here we are. Signal is more secure, yes. But NOTHING is bullet proof.
A federal courtroom in Texas became the setting for an unexpected cybersecurity lesson when FBI investigators showed they could pull copies of encrypted Signal conversations off a suspect's iPhone, despite the app having been completely wiped from the device: FBI retrieved deleted Signal messages from iPhone notification storage https://betanews.com/article/fbi-recovered-deleted-signal-messages-iphone/