Ever since my wife and I upgraded to iOS12, we have noticed that chargers in the car that used to work just fine, do NOT work any longer. In my car, for example, I have a multi USB adapter that used to charge both of our phones. Now only the top one will charge ANY of our phones. The rest are ignored. Her car charger won't do either of our phones now either. This all started with iOS12. It worked just fine before the update. Ideas?