Originally Posted by
IAH-OIL-TRASH
The waitlist of those stranded usually disappears when (or very shortly after) flight closes, but the list of those who were upgraded, and their seat assignments, remains.
Indeed, for the app, but the website does retain the list of stranded after the flight closes.
Very occasionally I have seen the upgraded list not be updated even though the GA did upgrade someone, and it then looks like there was an empty F seat when there wasn't. I'm not sure why that happens.