I've recently been alerted by my players that when I (the GM) look at another page that the players suddenly load into a blacked-out map page, presumably the one I'm looking at. Thankfully I often wait to turn on Dynamic Lighting until the scene starts but it's frustrating that I MUST stay on the same page as my players or they will know I'm on another page or worse yet get the entire map is revealed even though I haven't moved the ribbon.