The problem still persists with build 14931 (updated 9/21). I’ve discovered that I can sometimes get a menu to appear if I click on one of the menus then slide over the adjacent menus quickly. If I shrink the editor window it also works intermittently. I realize this isn’t much help, but perhaps it could help point to a solution… Or maybe we just have to wait for MS to fix their build. Right now I’m wishing I’d got out of Insider when I had the chance.