Woocommerce checkout fields keep changing

Question

I use this code to change my checkout field layout, using the Woocommerce Checkout shortcode I put in the product page [woocommerce_checkout], it looks fine, but not in the checkout page, 1 sec It will then return to its original state. I tried changing the theme and disabling all plugins except Woocommerce, still happens. how to solve this problem?

/**Remove all possible fields
 **/
function wc_checkout_fields( $fields ) {
echo '<style>
.woocommerce-additional-fields {
    display: none;
}
.woocommerce-checkout #customer_details>* {
    margin-bottom: 1rem !important;
}
</style>';
$fields['billing']['billing_first_name']['priority'] = 10;
$fields['billing']['billing_first_name']['label'] = 'Name';
$fields['billing']['billing_first_name']['class'] = array( 'form-row-wide' );

$fields['billing']['billing_address_1']['priority'] = 20;
$fields['billing']['billing_address_1']['label'] = 'Address';

$fields['billing']['billing_country']['priority'] = 30;
$fields['billing']['billing_country']['label'] = 'Country';
$fields['billing']['billing_country']['class'] = array( 'form-row-first' );

$fields['billing']['billing_state']['priority'] = 40;
$fields['billing']['billing_state']['label'] = 'State';
$fields['billing']['billing_state']['class'] = array( 'form-row-last' );

$fields['billing']['billing_city']['priority'] = 50;
$fields['billing']['billing_city']['label'] = 'City';
$fields['billing']['billing_city']['class'] = array( 'form-row-first' );

$fields['billing']['billing_postcode']['priority'] = 60;
$fields['billing']['billing_postcode']['label'] = 'Postcode';
$fields['billing']['billing_postcode']['class'] = array( 'form-row-last' );

$fields['billing']['billing_phone']['priority'] = 70;
$fields['billing']['billing_phone']['label'] = 'Phone';
$fields['billing']['billing_phone']['class'] = array( 'form-row-first' );

$fields['billing']['billing_email']['priority'] = 80;
$fields['billing']['billing_email']['label'] = 'Email';
$fields['billing']['billing_email']['class'] = array( 'form-row-last' );

unset( $fields['billing']['billing_last_name'] );
unset( $fields['billing']['billing_address_2'] );
unset( $fields['billing']['billing_company'] );
unset( $fields['order']['order_comments'] );

return $fields;
}
add_filter( 'woocommerce_checkout_fields', 'wc_checkout_fields' );

With shortcode and first view at checkout

Checkout page changes after 1 second

After disabling JavaScript on your browser

Answer 1

I tried using this to remove the wc-checkout script and the layout became what I wanted

add_action( 'wp_enqueue_scripts', 'remove_woocommerce_checkout_scripts', 9999 );
function remove_woocommerce_checkout_scripts() {
    wp_dequeue_script( 'wc-checkout' );
}