Form component ends in Loader

[noonation]

I don't understand where the Loader is being invoked or what the logic of it is:
The code below is close to verbatim from the Example in the components doc.

The Loader apparently comes after the submitForm(controlValues) inside handleFormData

import React, { useState } from 'react';
import Form from '@mapbox/mr-ui/form';
import FormSubmit from '@mapbox/mr-ui/form-submit';
import ControlText from '@mapbox/mr-ui/control-text';
// import validateRequired from '@mapbox/mr-ui/validators/validate-required';

function validateNoOp(value) {
console.log('val', value);
return '';
}
const formConfig = {
name: {
label: 'Search term',
placeholder: 'Text to match in profiles',
validator: validateNoOp, // validateRequired('Your name'),
},
};

const InputForm = (props) => {
const renderForm = (getControlProps, onSubmit) => {
return (
<>

<ControlText {...getControlProps('name')} />

</>
);
};

const submitForm = (values) => {
console.log('sub', values);
if (props.onSubmit) props.onSubmit(values);
};

const handleFormData = (controlValues) => {
console.log('handle', controlValues);
submitForm(controlValues);
return controlValues;
};

return (

);
};
export default InputForm;