Hello. This is Klaytn API Service team.
Please refer to the following information about the different responses of Token History API and Klaytn Scope.
Occasionally, there can be circumstances when the token transaction records for EOA are presented differently for KAS API and Klaytn Scope. This may be due to a delay in the process of synching blockchain data, which leads Klaytn Scope to respond with the previous data that is different from that of KAS API.
In this case, you may double-check whether the data is recorded in the Scope by typing in the txHash acquired through the API call in Klaytnscope's search bar.
Klaytn API Service team.