Thanks for your feedback, we uploaded a new Portable file.
I followed your steps:
1) Create a task (any).
I created a specified time shutdown task.
2) WAS should go in the notification area (that's the system tray).
Yes, it was, go in hidden area directly. I must click the up arrow in the notification area to see the WAS tray icon.
3) Move the WAS tray icon in the HIDDEN notification area (i.e., you must click the up arrow in the notification area to see the WAS tray icon).
4) Click the WAS tray icon in the HIDDEN notification area, and WAS should appear.
Yes, it was.
5) Click the X in WAS: WAS should go again in the HIDDEN notification area, instead it disappears.
Yes, it was, WAS went to notification area.
But it is still present, when you check task manager.
Yes, it was, wise auto shutdown process still in task manager. Because I didn't cancel the task.