This question is an exact duplicate of:
But if you click on one of the tags, you'll be sent to a non-existent page: https://stackexchange.com/questions/tagged/shoes. I would have expected to land a the site's tag page instead:https://stackoverflow.com/questions/tagged/shoes.
For what it's worth, this is a very minor bug and unlikely to bother too many people as I do not believe the network search is widely known. (But it's really handy and more people should know about it!)