I was. I tried three USB cables and it kept locking. Ford told me to take it back to the dealer and the service tech. plugged his iphone in and it worked. He asked me to try mine and it worked and has been working ever since. He nor I have any idea why but it's working. Very strange.
This didn't work but if I reboot the system win accessory mode and the phone is plugged in to the USB and unlocked and then I get the connection including Apple Carplay with no screen lock up(although I was in a parked vehicle for less than a couple minutes?) . However this is not a suitable...
I'm having the same issues with the screen locking up every time I connect my iphone via USB. I tried several different cables but same problem. Ford representative suggested I reboot sync 3 and that worked for about ten minutes then locked up again.