Fortunately, they did foresee this! The push notification only contains enough information to tell the phone that it should fetch the actual notification conten

Fortunately, they did foresee this! The push notification only contains enough information to tell the phone that it should fetch the actual notification content from Signal's servers. Here's a Signal dev talking about it on the Signal-Android GitHub: https://github.com/signalapp/Signal-Android/issues/12961#issuecomment-1557968088 https://github.com/signalapp/Signal-Android/issues/12961#iss... And similarly for Signal-iOS: https://github.com/signalapp/Signal-iOS/issues/962#issuecomment-158685190 https://github.com/signalapp/Signal-iOS/issues/962#issuecomm...