It is not about the amount wins, but about the percentage of such case happening. Which in this case is even higher than Nakowa's JD.
I agree that you should check the bets are processed correctly, but the "percentage of the wins" is not really relevant IMO.
If I make a 0.01% bet and win, you can't say "it is too rare to happen" and stop paying me.
Similarly, if I make a 98% bet and lose, or if I lose 20 times consecutively in martingale , I can't say "you should refund me as it is too rare to lose".