I have a 2020 Tucson and I've had an intermittent problem with the entire sound system temporarily not working. I use CarPlay, connecting to my iPhone via a USB-Lightning cable. For example, today I started the car, plugged in my iPhone, the music screen came up, and I pressed "Play." No sound. I try switching to the car's radio, no sound. I try using Siri and no sound. The mute option is not on. I reset the entire system via the reset button, still no sound. The only fix is to turn off the car and leave the power off for at least one minute. I restart the car and everything works fine with full sound. Has anyone else experienced this issue? Why does it continually happen? (Fortunately, it doesn't happen too often.)