Have you managed to enter HOME and get the car to remember that?
Mine wouldn't save HOME nor any favourites until the dealer replaced a significant part (the equivalent of the head-unit) , but it took about 6 months to diagnose. Meanwhile, other functions did eventually work as expected including Connect and sharing favourites/destinations from the app. The Sat Nav still seems to be non-UK friendly when entering postcodes though better with later Maps (now on 22.4).