Recurring tasks in outlook today
 

I have a weekly recurring task that is displayed in Outlook Today.
Up until a week or so ago, every time I marked the task completed, moving
away from Outlook Today and coming back to it, for example, going to my
calendar then switching back to outlook Today, I would see that the completed
task has been removed and the next occurence of the task is then displayed.

Now, the completed recurrences stay displayed in Outlook Today, I don't wish
to see the completed tasks