So nothing wrong here but curious what happened:
I applied PP to a reservation that includes PDX-DEN this morning. For as long as the list was visible I was #2 and F was at 18/20. Just before boarding #1 disappeared off the list and (leaving me at #1) and F went to 19/20. 2-3 minutes later I got the "your upgrade has been confirmed" text and BP showed my new seat.
I was on both the app and gate list as cleared but the original #1 was no where to be found. Why did I show as a cleared UG and they didn't?