Fix addExpressionFieldToSelect method generated columns get overwriten by addFieldToSelect()

Author: Magently

lib/internal/Magento/Framework/Model/ResourceModel/Db/Collection/AbstractCollection.php

@@ -346,7 +346,9 @@ public function addExpressionFieldToSelect($alias, $expression, $fields)
             $fullExpression = str_replace('{{' . $fieldKey . '}}', $fieldItem, $fullExpression);
         }
 
-        $this->getSelect()->columns([$alias => $fullExpression]);
+        $fullExpression = new \Zend_Db_Expr($fullExpression);
+        $this->_fieldsToSelect[$alias] = $fullExpression;
+        $this->_fieldsToSelectChanged = true;
 
         return $this;
     }