MAGETWO-91628: Bundle product price doubled when switching currency

- Fixed an issue with quote item options relates to a bundled products.

Author: Alexey Yakimovich

app/code/Magento/Bundle/Model/Product/Type.php

@@ -735,7 +735,7 @@ protected function _prepareProduct(\Magento\Framework\DataObject $buyRequest, $p
                     $price = $product->getPriceModel()
                         ->getSelectionFinalTotalPrice($product, $selection, 0, $qty);
                     $attributes = [
-                        'price' => $this->priceCurrency->convert($price),
+                        'price' => $price,
                         'qty' => $qty,
                         'option_label' => $selection->getOption()
                             ->getTitle(),

app/code/Magento/Bundle/Plugin/UpdatePriceInQuoteItemOptions.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Bundle\Plugin;
+
+use Magento\Quote\Model\Quote\Item as OrigQuoteItem;
+use Magento\Quote\Model\Quote\Item\AbstractItem;
+use Magento\Framework\Serialize\SerializerInterface;
+
+/**
+ * Update prices stored in quote item options after calculating quote item's totals
+ */
+class UpdatePriceInQuoteItemOptions
+{
+    /**
+     * @var SerializerInterface
+     */
+    private $serializer;
+
+    /**
+     * @param SerializerInterface $serializer
+     */
+    public function __construct(SerializerInterface $serializer)
+    {
+        $this->serializer = $serializer;
+    }
+
+    /**
+     * Update price on quote item options level
+     *
+     * @param OrigQuoteItem $subject
+     * @param AbstractItem $result
+     * @return AbstractItem
+     *
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function afterCalcRowTotal(OrigQuoteItem $subject, AbstractItem $result)
+    {
+        $bundleAttributes = $result->getProduct()->getCustomOption('bundle_selection_attributes');
+        if ($bundleAttributes !== null) {
+            $actualPrice = $result->getPrice();
+            $parsedValue = $this->serializer->unserialize($bundleAttributes->getValue());
+            if (is_array($parsedValue) && array_key_exists('price', $parsedValue)) {
+                $parsedValue['price'] = $actualPrice;
+            }
+            $bundleAttributes->setValue($this->serializer->serialize($parsedValue));
+        }
+
+        return $result;
+    }
+}

app/code/Magento/Bundle/etc/di.xml

@@ -123,6 +123,9 @@
             </argument>
         </arguments>
     </type>
+    <type name="Magento\Quote\Model\Quote\Item">
+        <plugin name="update_price_for_bundle_in_quote_item_option" type="Magento\Bundle\Plugin\UpdatePriceInQuoteItemOptions"/>
+    </type>
     <type name="Magento\Quote\Model\Quote\Item\ToOrderItem">
         <plugin name="append_bundle_data_to_order" type="Magento\Bundle\Model\Plugin\QuoteItem"/>
     </type>