Yes, I’ve had the same issue before. Once on the PCH it was so bad I had to unplug for 150 miles or so. But it wasn’t doing it on my wife’s end. It has always come back normal after drying. I just assume it’s the plug in.
So it happened on the riders side and not the passengers side, thats good to know. Must be the headset plug. Did you by chance switch the audio over to the speakers to see if the feedback came through them?