Board Thread:Support Requests - Getting Technical/@comment-24253265-20171124174401

On some old wikis (not here) the left monobook sidebar contains a new Content-url link in the navigation portlet ( id="n-content" below id="p-Content_Navigation", example). Presumably newer than 2013, when I decorated some sidebar links I'm not interested with display:none in my global CSS. I consider to redirect the obscure Content-url to, say, Category:Browse. Is this a known bug, an unknown feature, or a side-effect of other WikiFeatures?  