@keithcurtis, no, like @Sarah R. Cohen, I have had the same experience as @Tariff since I started using roll20 two+ years ago, and I play with two other DMs who have the same problem. If you click on FOW, and then on reveal, about one time in 3 it selects hide instead (or, probably, simply fails to select reveal). It's too frequent to be a misclick because I'm so used to it I usually look closely when clicking now. Maybe the hitbox is a lot smaller than the text or something, but I'm using stock CSS, no tweaks. It's something of a running joke with our players when we hide parts of the map they've already been to by accident. I'd seen others comment on it, so I never bothered to report it, just assumed it was one of the many long-standing minor bugs that never got fixed. All three of us play without Dynamic Lighting, so that might be the issue. I use Firefox (Mac), but one of the others uses Edge (not sure what the third uses, maybe Chrome).