I have an issue my Sync 3 (version 3.4.22251), each time I start the car I have to set up the langage + the time.
It doesn't keep the parameters related to the langage (french) and the time.
You might want to look at that site for help as there are quite a few comments there about your very problem. Obviously Ford are not going to help you so I would raise a thread at Cyanlabs.