this happens to me when carplay starts but not yet connected. try disconnecting your phone and resetting the carplay (hold right button on the radio).Anyone not able to change SOURCE after installing the Isudar (or others)? I am stuck on FM radio, but can't hear anything anyway. SOURCE button just takes me to a System Info screen that tells me System version: v4.75, PCM3.1, Serial Number XXxxx, and has buttons for "Current system" and "History". Otherwise I'm able to connect to CarPlay without issue. Unfortunately with the current situation I've also lost the ability to listen to music via radio, bluetooth, etc. as well as making calls.