ENGCOM-3808: Issue fixed #20128 : Date range returns the same start and end date #20129

 - Merge Pull Request #20129 from opencommerce/magento2:2.3-develop-issue-20128
 - Merged commits:
   1. b1b6c3c

Author: magento-engcom-team

app/code/Magento/Reports/Model/ResourceModel/Order/Collection.php

@@ -445,7 +445,7 @@ public function getDateRange($range, $customStart, $customEnd, $returnObjects =
                 break;
 
             case 'custom':
-                $dateStart = $customStart ? $customStart : $dateEnd;
+                $dateStart = $customStart ? $customStart : $dateStart;
                 $dateEnd = $customEnd ? $customEnd : $dateEnd;
                 break;