Torflow doesn't stall. I compared the Torflow and sbws tor options. sbws sets `__DisablePredictedCircuits 1` and Torflow does not. So you could try removing that option from sbws: https://github.com/torproject/sbws/blob/10cda4bfdff1b777f5005ce9f5a433290aafa216/sbws/util/stem.py#L75 https://github.com/torproject/sbws/blob/10cda4bfdff1b777f5005ce9f5a433290aafa216/sbws/util/stem.py#L199