https://www.xda-developers.com/signal-updates-public-server-code/
Look into their MobileCoin and how they implemented it. They are just banking on people forgetting about it.
Anybody pulling these antics with a cryptography product loses my (and others) trust immediately. I'm a security soft dev, and my colleagues and I migrated to Element and Matrix network when it happened. I remember the disgust vividly.
Of course all of this is not going to be the Signal wikipedia page.. It's amazing how their fanbois work.