I don't know if I was just unlucky or something happened to my bets but I lost 19 bets in a row on x2 payout. I know it is possible to receive more than 19 but this happens once in many bets. I don't want to accuse Wolf.bet of "unclean" things, I was probably just unlucky.
This is just normal, I experience way more losing streak than 19 in a row on an x2 payout from other sites. It always happens especially when we are using the auto roll features. If you have some doubt, you can always review and verify the hashes created by your bets to check if it is really provably fair.