Maps not working in scoreboards

When I create a scoreboard objective like this: "/scoreboard objectives add usemap stat.useItem.minecraft.map" then put it in the side bar like this:"/scoreboard objectives setdisplay sidebar usemap" then I use an empty map by right clicking it the scoreboard doesn't go up. This happens in both survival and creative but I have noticed that if I have more than one empty map in a stack that if I use one of them it does go up please fix this asap