diff --git a/app/code/Magento/Catalog/Model/CategoryLinkManagement.php b/app/code/Magento/Catalog/Model/CategoryLinkManagement.php
index 0c2c324bd8e2c..d9c0f2798f732 100644
--- a/app/code/Magento/Catalog/Model/CategoryLinkManagement.php
+++ b/app/code/Magento/Catalog/Model/CategoryLinkManagement.php
@@ -36,20 +36,20 @@ public function __construct(
     public function getAssignedProducts($categoryId)
     {
         $category = $this->categoryRepository->get($categoryId);
-        $productsPosition = $category->getProductsPosition();
 
-        /** @var \Magento\Framework\Data\Collection\AbstractDb $products */
+        /** @var \Magento\Catalog\Model\Resource\Product\Collection $products */
         $products = $category->getProductCollection();
+        $products->addFieldToSelect('position');
 
         /** @var \Magento\Catalog\Api\Data\CategoryProductLinkInterface[] $links */
         $links = [];
 
         /** @var \Magento\Catalog\Model\Product $product */
-        foreach ($products->getItems() as $productId => $product) {
+        foreach ($products->getItems() as $product) {
             /** @var \Magento\Catalog\Api\Data\CategoryProductLinkInterface $link */
             $link = $this->productLinkFactory->create();
             $link->setSku($product->getSku())
-                ->setPosition($productsPosition[$productId])
+                ->setPosition($product->getData('cat_index_position'))
                 ->setCategoryId($category->getId());
             $links[] = $link;
         }
diff --git a/app/code/Magento/Catalog/Model/Resource/Category/Flat.php b/app/code/Magento/Catalog/Model/Resource/Category/Flat.php
index fcc0fbf435f68..e50743dc1b985 100644
--- a/app/code/Magento/Catalog/Model/Resource/Category/Flat.php
+++ b/app/code/Magento/Catalog/Model/Resource/Category/Flat.php
@@ -671,4 +671,23 @@ public function getAnchorsAbove(array $filterIds, $storeId = 0)
 
         return $this->_getReadAdapter()->fetchCol($select);
     }
+
+    /**
+     * Get positions of associated to category products
+     *
+     * @param \Magento\Catalog\Model\Category $category
+     * @return array
+     */
+    public function getProductsPosition($category)
+    {
+        $select = $this->_getReadAdapter()->select()->from(
+            $this->getTable('catalog_category_product'),
+            ['product_id', 'position']
+        )->where(
+            'category_id = :category_id'
+        );
+        $bind = ['category_id' => (int)$category->getId()];
+
+        return $this->_getReadAdapter()->fetchPairs($select, $bind);
+    }
 }
diff --git a/app/code/Magento/Catalog/Test/Unit/Model/CategoryLinkManagementTest.php b/app/code/Magento/Catalog/Test/Unit/Model/CategoryLinkManagementTest.php
index 9e75726f9dfa2..994bf9de2b062 100644
--- a/app/code/Magento/Catalog/Test/Unit/Model/CategoryLinkManagementTest.php
+++ b/app/code/Magento/Catalog/Test/Unit/Model/CategoryLinkManagementTest.php
@@ -44,7 +44,7 @@ public function testGetAssignedProducts()
     {
         $categoryId = 42;
         $productId = 55;
-        $productsPosition = [$productId => 25];
+        $position = 25;
         $productSku = 'testSku';
         $categoryProductLinkMock = $this->getMock('\Magento\Catalog\Api\Data\CategoryProductLinkInterface');
         $categoryMock = $this->getMock(
@@ -56,13 +56,14 @@ public function testGetAssignedProducts()
         );
         $productMock = $this->getMock('\Magento\Catalog\Model\Product', [], [], '', false);
         $productMock->expects($this->once())->method('getSku')->willReturn($productSku);
+        $productMock->expects($this->once())->method('getData')->with('cat_index_position')->willReturn($position);
         $items = [$productId => $productMock];
-        $productsMock = $this->getMock('\Magento\Framework\Data\Collection\AbstractDb', [], [], '', false);
+        $productsMock = $this->getMock('Magento\Catalog\Model\Resource\Product\Collection', [], [], '', false);
         $this->categoryRepositoryMock->expects($this->once())->method('get')->with($categoryId)
             ->willReturn($categoryMock);
-        $categoryMock->expects($this->once())->method('getProductsPosition')->willReturn($productsPosition);
         $categoryMock->expects($this->once())->method('getProductCollection')->willReturn($productsMock);
         $categoryMock->expects($this->once())->method('getId')->willReturn($categoryId);
+        $productsMock->expects($this->once())->method('addFieldToSelect')->with('position')->willReturnSelf();
         $productsMock->expects($this->once())->method('getItems')->willReturn($items);
         $this->productLinkFactoryMock->expects($this->once())->method('create')->willReturn($categoryProductLinkMock);
         $categoryProductLinkMock->expects($this->once())
@@ -71,7 +72,7 @@ public function testGetAssignedProducts()
             ->willReturnSelf();
         $categoryProductLinkMock->expects($this->once())
             ->method('setPosition')
-            ->with(25)
+            ->with($position)
             ->willReturnSelf();
         $categoryProductLinkMock->expects($this->once())
             ->method('setCategoryId')