I hope this will be clear enough. English isn' my primary language. I have attached a screenshot to help a bit.

If you view a user profile on a mobile device(or simply minimize your desktop browser to the minimum so the responsive layout kick-in) When you click on the small CB user menu that replace the tabs from the full screen mode,, and then click on any items in it(like the info tab, or blog tab) the menu will stay stuck on the screen, it won't go away.