ENGCOM-3503: issue #18349 Fixed for 2.3: Incorrect quote_item_id saved on order items during multiple address checkout #19192

 - Merge Pull Request #19192 from maheshWebkul721/magento2:multishipping-quote-issue
 - Merged commits:
   1. 517ef26
   2. f9adaee
   3. 6d90348
   4. 0bded20
   5. 261ab09

Author: magento-engcom-team

app/code/Magento/Quote/Model/Quote/Item/ToOrderItem.php

@@ -63,6 +63,16 @@ public function convert($item, $data = [])
             'to_order_item',
             $item
         );
+        if ($item instanceof \Magento\Quote\Model\Quote\Address\Item) {
+            $orderItemData = array_merge(
+                $orderItemData,
+               $this->objectCopyService->getDataFromFieldset(
+                   'quote_convert_address_item',
+                   'to_order_item',
+                   $item
+               )
+           );
+       }
         if (!$item->getNoDiscount()) {
             $data = array_merge(
                 $data,

app/code/Magento/Quote/etc/fieldset.xml

@@ -186,6 +186,11 @@
                 <aspect name="to_order_address" />
             </field>
         </fieldset>
+        <fieldset id="quote_convert_address_item">
+            <field name="quote_item_id">
+                <aspect name="to_order_item" />
+            </field>
+        </fieldset>
         <fieldset id="quote_convert_item">
             <field name="sku">
                 <aspect name="to_order_item" />