Same issue here in wordpress 4.1. Daniel, the problem is the “More” button that appears doesn’t populate a drop down menu when clicked on. Also when on mobile, if you click the “Menu” icon only the “More” button appears that doesn’t populate, unless you scroll down past the header, then all the links appear.
Edit: I discovered my issue… I had been using Bootstrap Shortcodes instead of Bootstrap 3 Shortcodes. Bootstrap Shortcodes seems to break the More button.