Key pop-up glitch
This issue has been bugging me for quite some time.
It's simple, despite having "key pop-up" enabled in settings, sometimes, randomly, the pop-ups won't appear, and the key suddenly isn't "clickable" at all.
I recorded a video to show the issue: http://i.imgur.com/yrcXzck.gif (can't hotlink images here?)
I hope you can fix this, because it's annoying as hell.