CarPlay Audio automatically switching

CarPlay recently began switching the audio source to my iPhone when I connect it to my Honda CR-V, which I don't want it to do. Even though I'd been listening to satellite radio previously, as soon as I connect my iPhone to my car, the audio input switches to the phone, which has no audio playing. This never used to happen until about 2-3 weeks ago. I'm running iOS 13.7 on my iPhone. I primarily use CarPlay so I can use Waze for navigation, which I've been using since 2008, and prefer to any other GPS maps system. On occasion, I'll use my iPhone for audio, too, but would prefer that it not usurp the audio input when I plug it in. There doesn't seem to be a setting for this. Any ideas as to why this is happening, and how I might correct it? Thanks!