https://github.com/bitcoin/bitcoin/blob/d72758c3f6c34cd835f5de3efc230964f3b1ea56/src/torcontrol.cpp#L539

If a user is running Tor proxy outside localhost (perhaps on other host inside LAN or in containerised environment) , the automatic creation of onion services ends up creating an onion service listening to hardcored 127.0.0.1 address on the Tor proxy's host instead of the private address of the bitcoind – effectively running an empty onion service listening the Tor proxy's localhost.
{
    
    if (service.IsValid())
        RemoveLocal(service);
    service = CService();
    if (!reconnect)
        return;
    LogPrint(BCLog::TOR, "tor: Not connected to Tor control port %s, trying to reconnect\n", target);
    
    struct timeval time = MillisToTimeval(int64_t(reconnect_timeout * 1000.0));
    if (reconnect_ev)
        event_add(reconnect_ev, &time);
    reconnect_timeout *= RECONNECT_TIMEOUT_EXP;
}
void TorController::Reconnect()
{
    /* Try to reconnect and reestablish if we get booted - for example, Tor
     * may be restarting.
     */
    if (!conn.Connect(target, std::bind(&TorController::connected_cb, this, std::placeholders::_1),
         std::bind(&TorController::disconnected_cb, this, std::placeholders::_1) )) {
        LogPrintf("tor: Re-initiating connection to Tor control port %s failed\n", target);
    }
}
fs::path TorController::GetPrivateKeyFile()
{
    return GetDataDir() / "onion_private_key";
}
void TorController::reconnect_cb(evutil_socket_t fd, short what, void *arg)