Came across this today as i "copy and linked" a menu across a few pages. Once added to the other pages the items inside the navbar would not select when clicked for editing. The footer that i linked across the same pages would not select for editing also.
Saving the project, closing BSS 4 and opening it again in BSS allows myself to now edit links and text associated with the linked items from the main index page.
Bug? But works on reopening project is not ideal till fixed.