Every morning as I drive to work at some random point on my trip my factory installed radio switches the station to a fuzzy channel 1 number away from the station I’m currently listening to. It happened in LA, and now I live in Illinois and it still happens. It only does it once per 20 minute commute. What’s that about?
If it’s under warranty, take it to the dealership. If it’s not then you’re going to have to spend money to fix it or learn to live with it. I doubt that there is anything you can do to correct it. Try your local radio repair shop for some advice.