Error Message :
N/A

From the Automic Web Interface (AWI), the different status types a Task in a Workflow can have is different between the list in the Process Assembly and the Workflow Monitor as seen in the screenshots below.

<Please see attached file for image>

<Please see attached file for image>

Cause type:
By design
Root Cause: Designed this way from a consistency perspective.

OS Version: N/A

The difference is that the task status (as shown in the activity window/process monitoring) is different than the task status within the parent which is shown in the Workflow Monitor. 

The graphical Workflow Monitor and list view of the Workflow Monitor shows the same status within the parent and is consistent.  From the Java User Interface (UI) it behaves the same way. 

The Activity Window shows the task status and the Workflow Monitor (graphical) shows the status within the parent. 

The Workflow Monitor in list views does not exist in the Java UI. 
 
Therefore, from a consistency perspective, this is the designed behavior for version 12.
 

Workaround :
N/A