Calling insert function in a parallel manner from aztec.js causes race condition

[sklppy88]

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// ISSUE #4243
// Calling this function does not work like this
// const numbers = [...Array(10).keys()];
// await Promise.all(numbers.map(number => contract.methods.insert_note(number).send().wait()));
// It causes a race condition and an error complaining about root mismatch