The fullname is displayed instead of the username if not empty

app/Model/SubTask.php

@@ -80,7 +80,7 @@ class SubTask extends Base
         $status = $this->getStatusList();
         $subtasks = $this->db->table(self::TABLE)
                              ->eq('task_id', $task_id)
-                             ->columns(self::TABLE.'.*', User::TABLE.'.username')
+                             ->columns(self::TABLE.'.*', User::TABLE.'.username', User::TABLE.'.name')
                              ->join(User::TABLE, 'id', 'user_id')
                              ->findAll();