I don't understand this onSubmit behaviour

[DavidMorgan92]

I have an isolated example here: https://github.com/DavidMorgan92/address-form

If you run the test you will find that one version of my AddressForm component fails but the other succeeds.

The first version passes down an onSubmit prop to the Formik form like this:

export default function AddressForm({ address, onSubmit, onCancel, disabled }) {
        ...

	return (
		<Formik
			initialValues={initialValues}
			onSubmit={onSubmit}
			validationSchema={addressSchema}
		>
                    ...
		</Formik>
	);
}

It fails with the test with this message:

When I add an intermediate step like this the test passes:

export default function AddressFormFixed({ address, onSubmit, onCancel, disabled }) {
        ...

	function handleSubmit(values) {
		onSubmit(values);
	}

	return (
		<Formik
			initialValues={initialValues}
			onSubmit={handleSubmit}
			validationSchema={addressSchema}
		>
                    ...
		</Formik>
	);
}

Can someone help me understand why this is the case? Why are those extra values being passed to the onSubmit function without the intermediate function?

Thank you very much.