Hotgym in htmcore

Hi everyone
I run the hotgym code in the htm.core folder and define seed = 777 or seed = 1 for the Spatial Pooler, but each time I run the code, the SDR is different from the last time. Does anyone know the reason for this? Given that the gym dataset is fixed, what should I do to make the generated SDR in each run similar to the previous one?