Not sure how to classify this, but it seems like a bug to me or ux or a feature request. Feel free to reclassify.
When on preferences, I now see this great Show muted topics link. However, when I go there it tells me “There are no latest topics. That’s sad.” That’s not sad, just a fact!
Better would be to suppress this link entirely if there are no muted topics, and if there are muted topics for the link to read e.g. You have 2 muted topics.