Refresh issue - Coupon not applied

Address problems where coupons are not being applied correctly upon refreshing.

add_action('wp_footer', function (){
	 if ( is_checkout() ) { ?>
        <script type="text/javascript">
          jQuery('body').on("click", ".checkout_coupon .form-row-last", function () {
              jQuery('body').trigger('update_checkout');
          });
        </script>
    <?php
	 }
});