I use Signal and about a month ago I shared this in several groups I am part of there.
https://cloud.google.com/blog/topics/threat-intelligence/russia-targeting-signal-messenger
https://cloud.google.com/blog/topics/threat-intelligence/russia-targeting-signal-messenger
Comments
"If successful, future messages will be delivered synchronously to both the victim and the threat actor in real-time, providing a persistent means to eavesdrop on the victim's secure conversations without the need for full-device compromise."