Your Community Category is appearing empty of content, BUT there are Topics present in control.
As you can see below I have 2 Topics in the counter, but NO content is shown.
There is a setting in the definition of the Category that shows content create by the community module.
The slider for Show community list needs to be turned ON in order to display and topics within that category.
With this slider now turned on, you can see the two articles missing above.
For more information on the creation of categories, see this article:
