Took me a while to find those, but got them
When custom pages are in use AND you have text setting (prefs) that pages MAY be directly edited those appear, but ONLy when in edit mode.
However they only do so (tested BS3) using sidebar right layout.
And indeed clicking has no effect. (looks viewable but overlapped)
It seems only to be displayed as part of the editable function. ( guessing....will be in shortcode handler)
Needs developer comment/advice or = issue. Please post as issue