I pay attention to a group of tags by looking at the following URL:
That works fine, and when you click on the 'Featured' tab, you get a list of the items featured. However, the (non-zero) number of featured questions does not show up in the original page (the URL above), whereas if you look at only a single tag, you do get the non-zero number of featured questions next to the featured tab.
This is the case whether you
and the tags together.