"A task is processed as a Complete Task assignment in the standard Complete Task flow (Data-AdHocTask.WorkTask).  The More Tasks Split-For-Each shape iterates across the Tasks page until all tasks on the grid are completed."

It looks that the More Tasks Split-For-Each is never reached as all the tasks are created with ShapeType = "Flowaction".

The actual flow that iterates across .Tasks is AdHocProcess called from pyCreateAdHocTasks post activity of  pyCreateAdHocTasks flow action

Please review