Is this something the Internet Archive could fix? I would have expected the torrent to get replaced when an upload is changed, maybe with some kind of 24 hour debounce.

"They're working on it." [1]

It sounds like they put this mechanism into place that stops regenerating large torrents incrementally when it caused massive slowdowns for them, and haven't finished building something to automatically fix it, but will go fix individual ones on demand for now.

[1] - https://www.reddit.com/r/theinternetarchive/comments/1ij8go9...