I noticed this initially in b7 (I think) but definitely in b8 - when I plug in my iphone for carplay and then pull up directions someplace in Apple Maps, it will route and then a few minutes later just stop giving directions and essentially just go back to the "start" screen in Maps and the directions disappear like a destination was never initiated. It seems ok if I use Google Maps. Not sure if it is limited to carplay but that is really the only time I use Apple Maps. Anyone seeing this issue or is it known? I didn't see anything exactly the same when I searched.