RuntimeWarning: invalid value encountered in sqrt stdev = np.sqrt(model.variance(domain)) +1e-6

[UCASAlbert]

Dear guys:
In the demo notebook "edbo_demo_and_simulations.ipynb", I tested for many times that the astitled RuntimeWarning occurs when batch_size or iteration times grows.
Besides, the ploted figure seems weird that the points are out of the curve.
How could I fix this point？