iPhone 11 Pro lightening cable audio issue

So we’re heading to visit some family for Thanksgiving and I plugged in my iPhone 11 Pro to the USB port in my wife’s car. It’s a standard lightening cable. Within a few seconds there’s a pop or slight scratch through the speakers. That’s the best I can do to describe the sound, but it happens every few minutes or so. I’ve been using this phone in my car with a Bluetooth connection and haven’t had any audio issues. We tried a different cable with the same result. Any ideas what could be happening or could this be a software issue?