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What do you think - if RooBet ever adds BEP-20 network to its system, will it be possible to solve this problem?
Not sure. Because usually the balance is credited (as such) by the smart contract order after reaching the minimum confirmation amount, maybe at that time your address was missed because the trigger confirmation was exceeded. Teams have to add manually (if they can).
Or if the BEP20 and ERC20 networks will generate different deposit addresses, then that won't change your situation.