But it works for any older branch that can be found here in any older revision. And it worked for us before migration (I don't know which version was before). And now it doesn't work for us, and it doesn't work here for any recent branch.

@chad, I've just tried to search for herald_queryrules which is a Phabricator branch and no results too. Or please provide me a what you call "a branch on this server/repository" to test, I'll try.