Cannot push rawTX consecutively?

by manhluna   Last Updated October 18, 2019 16:27 PM

When I use the blockcypher's api or the bitcore's api to push rawtx, I can only send successful transaction the first time. If I send the next transaction immediately, I will receive an empty return and the transaction cannot be sent. I have to wait for the previously submitted transaction to be confirmed, then I can send the next transaction. I cannot send forward transactions even though the transaction is valid. Why?

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