First time I have had this issue. Got notification of upgrade (via email) shortly after I checked in on the app the day prior.
When I go to choose seats the next day (day of flight) I cannot. 2 of us and only 2 seats so easy. So I call and she assigned the seats. Then on the app it said I needed to checkin (boarding pass did not update so I tried to choose seat and it gave a message about checking in) but after going through it it told me to see agent at counter. I called in and agent said everything looks fine.
At airport counter agent can print boarding pass but not assign seats. But when looking at seat assignments she sees there is someone assigned.
Finally she tells us to ask at gate.
At gate he said somehow they put us on standby so when at the gate they checked us in it fixed it.
I did see us on the waitlist for standby earlier on the app and found that strange.
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Anybody know what went wrong?
Plenty of upgrades before and never issues.