MAGETWO-65421: [GitHub][PR] #8618: Apply coupon code button issue on Checkout #8759

Author: magento-team

app/code/Magento/SalesRule/view/frontend/web/js/view/payment/discount.js

@@ -15,11 +15,12 @@ define([
 
     var totals = quote.getTotals(),
         couponCode = ko.observable(null),
-        isApplied = ko.observable(couponCode() != null);
+        isApplied;
 
     if (totals()) {
         couponCode(totals()['coupon_code']);
     }
+    isApplied = ko.observable(couponCode() != null);
 
     return Component.extend({
         defaults: {