A rather frustrating bug that I became aware of when generating navigational menus for custom post types using wp_list_pages(). The list entries aren’t decorated with useful classes denoting the current item, the parent item, and ancestor(s). Read about the issue here.
So Yoast’s Google Analytics for WordPress plugin has a somewhat annoying “bug”, or oversight rather, where it rewrites relative link URLS to full URLs, including anchors. For example, <a href="#anchor"> becomes <a href="https://planetjon.ca/blah/#anchor">. There is more information about this on the wordpress forums.