Not sure if you've fixed this yet. But my 15 plate Titanium does this sometimes, USB vharges but won't sync and bluetooth goes on the blink
Its the 10A in location 24 in the glovebox fusebox inmycar.
Switch off ignition, (open and close doors so the powers off), remove the 10A from location 24 and make sure its not blown (Only used for SYNC module not for USB socket) which is the middle and furthest too the right
Replace 10A with new or same fuse if its not blown and then start ignition as normal.
See if that works for you. I attached the Bmax fuse location diagram too (hopefully)