HTTP Requests Manager (blocking modes) sets every request's redirection to 1 on http_request_args. The updater's no-redirect requests then followed GitHub's redirect: signed_address() lost the Location, so private updates failed (and the token went to the download host), and fetch_web()'s HEAD on releases/latest got 200 instead of a redirect. remote_no_redirect() holds redirection at 0 for that one URL at PHP_INT_MAX. Updater copy 1.0.1 (the GH#261 change had not raised it).