ENGCOM-3312: [Backport] Fixed issue #4468 'Unable to insert multiple catalog product list wid… #18874

 - Merge Pull Request #18874 from gelanivishal/magento2:2.2-develop-PR-port-18714
 - Merged commits:
   1. 3f17772

Author: magento-engcom-team

app/code/Magento/CatalogWidget/Block/Product/ProductsList.php

@@ -196,7 +196,7 @@ public function getProductPriceHtml(
             ? $arguments['display_minimal_price']
             : true;
 
-            /** @var \Magento\Framework\Pricing\Render $priceRender */
+        /** @var \Magento\Framework\Pricing\Render $priceRender */
         $priceRender = $this->getLayout()->getBlock('product.price.render.default');
 
         $price = '';
@@ -338,7 +338,7 @@ public function getPagerHtml()
             if (!$this->pager) {
                 $this->pager = $this->getLayout()->createBlock(
                     \Magento\Catalog\Block\Product\Widget\Html\Pager::class,
-                    'widget.products.list.pager'
+                    $this->getWidgetPagerBlockName()
                 );
 
                 $this->pager->setUseContainer(true)
@@ -398,4 +398,19 @@ private function getPriceCurrency()
         }
         return $this->priceCurrency;
     }
+
+    /**
+     * @return string
+     */
+    private function getWidgetPagerBlockName()
+    {
+        $pageName = $this->getData('page_var_name');
+        $pagerBlockName = 'widget.products.list.pager';
+
+        if (!$pageName) {
+            return $pagerBlockName;
+        }
+
+        return $pagerBlockName . '.' . $pageName;
+    }
 }