Loki here, just to back up what @Lemon said and to explain what’s happening:
It is not bugged when you get “RJB” it means that the roulette failed first try. RJB is a consolation prize in Lucky Roulette. if you are unlucky, you get it. The thing is, there is no “animation effect” whenever it fails. that’s why it simply looks as if you obtained RJB.