When I make edit to any of my pages, click save and then navigate away from that page I'll get a pop up that asks "Do you want to leave this site? Changes you made may not be saved." I assume maybe I didn't save my changes and click save again, but get the same pop up when I try to navigate away. When I get tired of this and click Leave rather than Stay I can navigate to another page, but sometimes my changes aren't saved.
Thanks Lem! I was also seeing this issue yesterday. If you have a place where we can reproduce this can you please share? I'm seeing it sporadically.