This was a first for me… upgrade cleared overnight for an early AM flight. My boarding pass in app showed the new seat, but the one in Apple Wallet wouldn’t update, even deleting it and re-adding - it still showed the PC seat.

I showed up at the gate exactly 10 min after boarding started, got me BP scanned to board… and didn’t have a seat.

The gate agent had to re-seat me in 2A (the seat I saw in the app), and said “you’d never checked into your new seat, so the system gave it up. You have to re-check in when you’re upgraded or when boarding starts it thinks you’re not here and gives up your seat.”

Really? If that’s the case, it’s easy enough to do, but that sounds fishy. I was at the gate to board 20 min before flight time.