Two days ago, I called AA to upgrade an LHR-RDU segment late this week with miles for 3 passengers (W to J). The agent said that she saw the availability, but could not get it to apply or even waitlist the flight. She advised me to call back the next day. The following day (yesterday) I called back and got an extremely pleasant agent who spent over 90 minutes on the phone with her helpdesk getting their system to apply the upgrades. I can now select seats and order meals for J. However, over 24 hours later, the ticket still shows as “on request” on the website and as PNRPNR / PENDING on the app. Do I have reason to be concerned about whether this ticket will actually get issued in the few days left? Has anyone else had this strange experience with upgrade space that does seem to exist but is difficult for agents to apply?