Another bug is USB device (phone or other) integration. If you have the USB device (like a phone) as the audio source and turn off the car and disconnect it, you won't be able to switch audio inputs when the car is powered back on unless the device is reconnected. Speaking w/Mazda, they state the source has to be changed prior to device removal, even if the car is powered off. Annoying! Basically - if you have a phone connected via USB, you have to change to another input prior to turning off the car.