My bad man! It seems you fell in your failure rate, which is 53%. To check your 47% winning rate, at worst case you are supposed to roll 54 times. In which one will be winning roll. You rolled only 13 and all fell under lost percentage.
And "don't refresh page" is working fine for me. But I experienced the duration between rolls is decreasing if number of rolls increases.
Probability distribution algorithm and random number generation algorithm never give accurate results, well.. That is why they are famous
to check your luck. Also freebitco does not provide accurate stopping options. You can stop if your balance decreases below certain point or your winnings exceeds certain point. And they are stopping accurately if I limit number of rolls. So you are giving false statement? I'm not sure. Maybe.
It does not stop if your bet increases twice. It is actually increasing the duration between rolls. Sometimes it hangs your browser for longer duration but it never stops. At least for me.