ACP2E-2897: [CLOUD] graphql addProductsToCart api issue with custom option

Author: veloraven

app/code/Magento/Quote/Model/Cart/AddProductsToCart.php

@@ -157,7 +157,8 @@ private function addItemToCart(Quote $cart, Data\CartItem $cartItem, int $cartIt
                 $cartItemPosition
             );
         } else {
-            $product = $this->productReader->getProductBySku($sku);
+            $productBySku = $this->productReader->getProductBySku($sku);
+            $product = isset($productBySku) ? clone $productBySku : null;
             if (!$product || !$product->isSaleable() || !$product->isAvailable()) {
                 $errors[] = $this->error->create(
                     __('Could not find a product with SKU "%sku"', ['sku' => $sku])->render(),