Issue with Task not displaying

Need more details. Check the task instance. How does actual assignment look like? Are you in the list of assignees/groups? By any chance, did you open the "Edit View" in modeler? If yes, then the process is paused and tasks are not visible.

Thanks a lot Stefan for your quick response as often. Please check the attached screenshots as answers to the questions raised. Thanks in advance .

I am not sure what u are asking for again. I already sent the full view of the entire monitoring view. 

It is not about the tab "Monitoring" in Designer, but about this

https://docs.appian.com/suite/help/21.2/Monitoring_and_Editing_Processes.html#monitor-mode

Viewing a Process in Monitor Mode

To access Monitor mode for a process instance:

1. Navigate to the Monitoring view in Appian Designer or an application view.
2. Locate the process instance that you want to monitor.
3. Click on the Name link.
4. The process instance opens in Monitor mode in the Process Modeler. The current status of the flow objects are displayed.

You made it a "Quick Task". Disable that feature and it will work as expected.

docs.appian.com/.../Process_Model_Recipes.html

I disabled the "Quick Task" , but it comes automatically on every new process. Have a look at the following  screenshots: 

I started a new process thereafter : 

Did you "Safe&Publish" the model?

No. I forgot to re-publish the process model . Thanks a bunch !

You are welcome :-)

You are welcome :-)