I don’t recall ever seeing the progress bar involved in an update. They download in the background while you drive and then you install them with the car, parked and locked. Can you post a screenshot of what you’re ?

 

Here's a screen shot. The previous update worked as you described. This one just sits with the progress shown. I assume the progress bar is showing the how much of the download has occurred, but don't really know.

 

Oh, I recall that weird little one… that took like 10 seconds. I’d reboot the screen and try again, unless someone has a better idea?

 

Reboot the screen? How do you do that? The car has been driven for weeks with this message.

A different question: does a factory reset remove any OTA updates that have completed?

 

Push the Infotainment power button in and hold until the screen goes dark. Takes like 10 seconds. The Infotainment screen will reboot. If the update didn't take, it will probably ask you to accept the update again.

The update in question was an Infotainment update and not a software update that affects the modules of the car, like ID software update 3.1 to 3.5. Those take weeks to download in the background and when finally prompted to download may take a few hours to complete with the doors locked and you staying away from the car. You will not see a progress bar with the ID software updates. It's also wise to do any of the updates with a strong 4G signal.