I noticed in the latest update that post category links are not displaying category-related posts when clicked on. It appears to be theme related; as changing to another theme while seems to not display this issue. I also disabled all other plugins to ensure that it was not plugin related either. Setting a page to a blog template and choosing a category works without issue. The issue seems to be related only to when the category is added as a link to the main menu. The theme and plugins are all up to date and the issue only surfaced after the most recent update.