Do you follow the US Government leaks surrounding the Immaculate Constellation / Legacy Program topics? One of the recent leaks included a guy claiming that FBI has compromised Signal and has backdoor access.
I believe the journalist Ross Coulthart who was following the topic said the same thing at one point.
This whole topic to me is an example of how Signal Messenger makes it difficult to use a Librem 5 with their service, because their work with the government requires a device where the “user” is not root in order to compromise the communications with Client-Side-Scanning.
[NOTE: Signal and the FBI will tell you that I am promoting a conspiracy theory by posting this, so if you would like, it’s OK to laugh off what I am saying as baseless.]
[NOTE 2: I do not have an alternative encrypted communication technology to endorse. I do not use well-encrypted communications. All my stuff is compromised totally.]