I don't remember if I was or not at the time it was happening. But, once I got to the shop where the car was, it was fine. I was attributing the offline message to the car not having a signal in that guys garage. (It was not in service mode)
I started having a new problem this morning. The app looked like it was working fine, mobile key worked for unlocking and driving, but none of the app features that I tried worked. I continuously got a "That didn't work. Try again." message whenever I pushed any of the climate controls in the app. It also wouldn't let me click the preconditioning button in the app. It was greyed out saying "Preconditioning is unavailable". But, I just tried your trick above
@Buffalo Bob. And that seems to have fixed it. Thanks!