I finally took my '17 EX Sport to the dealer because the Sync 3 was not updating and still on v2.0 even though the system was definitely connected to my router.
They diagnosed it and said it was the APIM module which I guess is also a modem device.
Part should be in middle of the week so we will see.
My wife's '17 Mustang GT also will not update and is on v2.3.
After pressing "Scan for updates" it will scan forever and never hook up
Dealer said they can "install" the latest update at the dealership
I will keep you apprised of what happens
Way to go Ford
BTW...since the diagnosis of my Ex Sport, I had to reconnect my phone to the system and my MPG reading in the Trip modes is super inaccurate now. I was showing about 17mpg around town and about 22 on the hiway right before the diagnosis but now it fluctuates all the way down to about 8mpg. The reading also changes quickly when I'm standing still.