diff --git a/vendor/magento/module-checkout/view/frontend/web/js/view/billing-address.js b/vendor/magento/module-checkout/view/frontend/web/js/view/billing-address.js
index e728a5c..747c948 100644
--- a/vendor/magento/module-checkout/view/frontend/web/js/view/billing-address.js
+++ b/vendor/magento/module-checkout/view/frontend/web/js/view/billing-address.js
@@ -71,25 +71,29 @@ function (
 
         /**
          * @return {exports.initObservable}
          */
         initObservable: function () {
             this._super()
                 .observe({
                     selectedAddress: null,
                     isAddressDetailsVisible: quote.billingAddress() != null,
                     isAddressFormVisible: !customer.isLoggedIn() || !addressOptions.length,
-                    isAddressSameAsShipping: false,
+                    isAddressSameAsShipping: true,
                     saveInAddressBook: 1
                 });
 
             quote.billingAddress.subscribe(function (newAddress) {
+       if (!quote.shippingAddress()) {
+           return this;
+       }
+
                 if (quote.isVirtual()) {
                     this.isAddressSameAsShipping(false);
                 } else {
                     this.isAddressSameAsShipping(
                         newAddress != null &&
                         newAddress.getCacheKey() == quote.shippingAddress().getCacheKey() //eslint-disable-line eqeqeq
                     );
                 }
 
                 if (newAddress != null && newAddress.saveInAddressBook !== undefined) {