I’m traveling on an U fare AA award for a JAL operated BOS-NRT - when I use my JAL PNR to try and modify my seat from an aisle seat (2C) to one of the available window seats (4A/K, 7A/K) and hit confirm, it confirms my seat, but then when I refresh the page it shows my seat as the original 2C again (AA app still shows 2C as well so it’s not a display issue).

Ive called JAL twice to assign the seat from their end and they have no problem selecting the seat but then it overrides them too and they just tell me to wait until I get to the airport to assign a window.

Any idea what’s going on here? On a 787-9 (the 2-2-2) 7 is a bulkhead so maybe those are overriding me because they’re bassinet seats (but oddly I can select them and hit confirm as opposed to selecting 1K in first where it’s just blocked out), but I can’t imagine row 4 (last row in a mini cabin) is a bassinet seat? Any advice on how to get a window assigned? For my first 787 flight I kind of want a window...

thanks