Sequential Transaction submission but getting insufficient funds

[sachin-kiwi]

Hi, I am using EIP-1559 transaction format for fund and mint nft . Today i observed that my fund transfer transaction is confirmed in a pending block (6blocks more than current active ) which is yet to finalised and given me transaction id after that when i perform mint transaction i am getting following error
insufficient funds for gas * price + value

Is it possible since that block is not in complete but transaction is sucess status my funds might be internally seen as less than required and transaction getting failed.I saw explorer showing updated funds
i am using web3.js library . Am i missing something in my approach which causing issue in mint txn