immediately after receiving the token, your wallet burns it and issues a new one with the mint. only then the transaction is complete (and you know it wasn't a double-spend).
Discussion
thinking about it again my question seems irrelevant in the case of zaps as it comes from an actual lightning wallet (right?). my setup now is i'm sending zaps from LNbits and receiving zaps on my @ npub.cash, is this the right way to use it?