function woocommerce_checkout_state_dropdown_fix() {
 
    if ( function_exists( 'is_checkout' ) && ! is_checkout() ) {
        return false;
    }
 
    ?>
    <script>
        jQuery(function () {
            // Snippets.ir
            jQuery('#billing_country').trigger('change');
            jQuery('#billing_state_field').removeClass('woocommerce-invalid');
        });
    </script>
    <?php
}
 
add_action( 'wp_footer', 'woocommerce_checkout_state_dropdown_fix', 50 );