Well that is actually it.
Although from the testing i did i had to turn the radio volume down and up every time i wanted to contact.
But yes that workaround actually works, just down and up the volume every time you want to contact, since apparently it resets the volume to mute since the latest patch (well, for me and possibly a few others at least, that is).
Thanks a lot Ramsay,
while tedious, and hope it gets solved quickly, at least the workaround makes it so you can use the radio.