diff --git a/module/bug/control.php b/module/bug/control.php
index 5b8fa4fcf7..b0c319c502 100755
--- a/module/bug/control.php
+++ b/module/bug/control.php
@@ -916,7 +916,7 @@ class bug extends control
      * @access public
      * @return void
      */
-    public function edit($bugID, $comment = false, $kanbanGroup = '')
+    public function edit($bugID, $comment = false, $kanbanGroup = 'default')
     {
         if(!empty($_POST))
         {
@@ -1351,7 +1351,7 @@ class bug extends control
      * @access public
      * @return void
      */
-    public function assignTo($bugID, $kanbanGroup = '')
+    public function assignTo($bugID, $kanbanGroup = 'default')
     {
         $bug = $this->bug->getById($bugID);
         $this->bug->checkBugExecutionPriv($bug);
diff --git a/module/kanban/model.php b/module/kanban/model.php
index 6caf745fc9..38288b99c5 100644
--- a/module/kanban/model.php
+++ b/module/kanban/model.php
@@ -827,7 +827,7 @@ class kanbanModel extends model
      */
     public function getRDKanban($executionID, $browseType = 'all', $orderBy = 'id_desc', $regionID = 0, $groupBy = 'default', $searchValue = '')
     {
-        if($groupBy != 'default') return $this->getKanban4Group($executionID, $browseType, $groupBy, $searchValue);
+        if($groupBy != 'default' and $groupBy != '') return $this->getKanban4Group($executionID, $browseType, $groupBy, $searchValue);
 
         $kanbanData   = array();
         $actions      = array('sortGroup');
diff --git a/module/story/control.php b/module/story/control.php
index 87cfc0166f..6b3a43444e 100644
--- a/module/story/control.php
+++ b/module/story/control.php
@@ -662,7 +662,7 @@ class story extends control
      * @access public
      * @return void
      */
-    public function edit($storyID, $kanbanGroup = '')
+    public function edit($storyID, $kanbanGroup = 'default')
     {
         if(!empty($_POST))
         {
@@ -1701,7 +1701,7 @@ class story extends control
      * @access public
      * @return void
      */
-    public function assignTo($storyID, $kanbanGroup = '')
+    public function assignTo($storyID, $kanbanGroup = 'default')
     {
         if(!empty($_POST))
         {
diff --git a/module/task/control.php b/module/task/control.php
index e46a6399c5..104163f453 100755
--- a/module/task/control.php
+++ b/module/task/control.php
@@ -470,7 +470,7 @@ class task extends control
      * @access public
      * @return void
      */
-    public function edit($taskID, $comment = false, $kanbanGroup = '')
+    public function edit($taskID, $comment = false, $kanbanGroup = 'default')
     {
         $this->commonAction($taskID);
         $task = $this->task->getById($taskID);
@@ -712,7 +712,7 @@ class task extends control
      * @access public
      * @return void
      */
-    public function assignTo($executionID, $taskID, $kanbanGroup = '')
+    public function assignTo($executionID, $taskID, $kanbanGroup = 'default')
     {
         $this->commonAction($taskID);
         $task = $this->task->getByID($taskID);
@@ -2110,7 +2110,7 @@ class task extends control
      * @access public
      * @return void
      */
-    public function editTeam($executionID, $task, $kanbanGroup = '')
+    public function editTeam($executionID, $task, $kanbanGroup = 'default')
     {
         $taskID = $task->id;
         $this->commonAction($taskID);