Add missing constraint in search result query

public/typo3conf/ext/ep_products/Classes/Domain/Repository/ProductRepository.php

@@ -98,6 +98,13 @@ class ProductRepository extends AbstractRepository
             );
         }
 
+        if (null !== $filterSettings['productsPid']) {
+            $qb->andWhere($qb->expr()->eq(
+                'date.product_pid',
+                $qb->createNamedParameter($filterSettings['productsPid'], Connection::PARAM_INT))
+            );
+        }
+
         $this->addFiltersettingsConditions($qb, $filterSettings);
 
         return $qb