because here it clearly says that signal had dealt with this problem https://tobi.rocks/2016/04/whats-app-retransmission-vulnerability/ https://tobi.rocks/2016/

because here it clearly says that signal had dealt with this problem https://tobi.rocks/2016/04/whats-app-retransmission-vulnerability/ https://tobi.rocks/2016/04/whats-app-retransmission-vulnerab... So it is solely whatsapp's fault