All navigation buttons disappear when exiting full browser mode.  This happens desktop browsers I've tried.
This does not happen on mobile devices. On iOS devices, when I leave full browser, the buttons are still there. Interestingly, if I tap on the screen, all buttons disappear, and when I tap again, they come back, but on desktop browsers, they're just not there any more when I exit full browser mode. I have to relaunch the gallery for them to come back.

http://www.dupuissenecal.com/site/c.rea … chens.html

thanks for any insight.