Hello everyone my name is chrixgamer, and I usually found some issue about card battle, that when someone will try to challenge you if either she/he is using an alt account or main account and if you are in his/her friends world or somewhat that she/he has access rights to that world, and we you accept that card challenge and has a bet on it, is that they will ban you or kicked you in his/her world, and also the bytes that you bet on the card battle challenge well be scammed.
you could bet in a popular world like CARD or a dynamic world for example ForestHills, that would be an easy solution to not getting scammed.