Hi xeon,JDP seems to be on to something. I did unpair, reset...forget...etc....but nothing worked. However, just waiting did. When I got back into the Jeep 3 hours later...CarPlay functioned normally.
What I also did...and not sure if it was any help or not yet was locate the other iphones that had been connected to the UConnect. Within the settings, I was able to de-select "CarPlay" for those devices. Apparently Uconnect things anything you plugin that has car play ability should over-ride the first. Not that I don't love my son or wife...but ... no.... dont mess with my CarPlay... LOL. PIcked up the family later in the day .... they all plugged in and no problems.
Stay tuned as I imagine this issue is not over yet.
We're sorry to hear that you had this experience. If it occurs again, please send us a message so that we can assist further.
Jeep Social Care Specialist