Fixed Configurable Products Pagination issue

Author: rimple-saini

app/code/Magento/Sales/Block/Order/Items.php

@@ -144,7 +144,7 @@ public function getOrder()
      */
     private function preparePager(AbstractBlock $pagerBlock): void
     {
-        $collectionToPager = $this->createItemsCollection();
+        $collectionToPager = $this->itemCollection;
         $collectionToPager->addFieldToFilter('parent_item_id', ['null' => true]);
         $pagerBlock->setLimit($this->itemsPerPage);
         $pagerBlock->setAvailableLimit([$this->itemsPerPage]);
@@ -161,9 +161,6 @@ private function createItemsCollection(): Collection
     {
         $collection = $this->itemCollectionFactory->create();
         $collection->setOrderFilter($this->getOrder());
-        $currentPage = (int)$this->getRequest()->getParam('p', 1);
-        $collection->setCurPage($currentPage);
-        $collection->setPageSize($this->itemsPerPage);
 
         return $collection;
     }