Huh, my other pages don't have the same issue. I guess the search indexer must've died - I'll restart it in an hour or two.
FWIW, the snapshot of c2 that this runs off of is somewhat dated (https://archive.org/details/c2.com-wiki_201501), so the last ~7 years of updates after the move to the federated wiki aren't present.
Does anyone know where these original pages ended up in fedwiki after the migration?