I went on first road trip with kids in the back seat and bought some anker USBc to lightning cables to charge the kids ipads but they would not charge. When I got home, tried my original apple usbc to lightning and it also didn't charge the ipad from the rear usbc ports but could charge my iphone. Anker cable also charges the iphone...not sure what the issue is, is it a power issue and that the rear ports do not have enough to charge an ipad? Is there a workaround other than using the 12v outlet in the center armrest? my VW atlas rear ports charge just fine...this seems like an oversight on tesla's part as the rear passengers likely kids using tablet devices not iphones..