Might be a problem with channels to the Hub node. I have channels with nostr:npub1l0ans4w4psmcv6hsqjz2v3mxszhputlsfn4emkynv3jlwrfez59s35q0ug and my own node, and it usually works. But my node has channel with nostr:npub1ex7mdykw786qxvmtuls208uyxmn0hse95rfwsarvfde5yg6wy7jq6qvyt9 and many others, which makes it a well connected one.