code: private void updateHubHeartbeatSelf()
    {
      _isHubHeartbeatSelf = true;
      
      if (_hubHeartbeatCount < 2) {
        for (Result<Boolean> result : _hubHeartbeatList) {
          result.ok(true);
        }
        
        _hubHeartbeatList.clear();
      }
    }
docs: If the join is to the self server, and there's only one successful
  join, update immediately.