Update cartAddressId through cart billing address.

Author: eugene-shab

app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingMethodsOnCart.php

@@ -60,9 +60,8 @@ public function execute(ContextInterface $context, CartInterface $cart, array $s
         }
         $methodCode = $shippingMethodInput['method_code'];
 
-//        $quoteAddress = $this->getQuoteAddress->execute($cart, $context->getUserId());
-//        $this->assignShippingMethodToCart->execute($cart, $quoteAddress, $carrierCode, $methodCode);
-        $quoteAddress = $cart->getShippingAddress();
+        $cartAddressId = $cart->getBillingAddress()->getId();
+        $quoteAddress = $this->getQuoteAddress->execute($cart, $cartAddressId, $context->getUserId());
         $this->assignShippingMethodToCart->execute($cart, $quoteAddress, $carrierCode, $methodCode);
     }
 }