Checkout Fields – Postcode always after state

I am trying to create a filter to change the order of the Billing Fields. I have got it mostly working, however, no matter where I place ‘billing_postcode’ the field is always next to the state field.

Is there any way to decouple the postcode field from the state field?

This is what I am using:

function custom_woocommerce_checkout_fields( $fields ) {

$order = array(
    "billing_state",
    "billing_first_name",
    "billing_last_name",
    "billing_address_1",
    "billing_address_2",
    "billing_postcode",
    "billing_city",
    "billing_country",

);

foreach ($order as $field) {
    $ordered_fields[$field] = $fields["billing"][$field];
}

$fields["billing"] = $ordered_fields;
return $fields;
} add_filter( 'woocommerce_checkout_fields' , 'custom_woocommerce_checkout_fields' );