Unable to use abilities or summoners until exiting and reloading the game.

Has anyone else experienced this bug? While very rare, being an avid player, I have experienced this bug more times that I can count. It is extremely annoying, and if you don't realize your game is bugged before you try to use a skill on an enemy, you are pretty much screwed in lane phase. You are unable to use skills, summoners, or even to b using your keyboard, but clicking the actual skill image to use it DOES work. Obviously, this isn't something you can do all game, and only exiting the game and reloading solves the issue. (Albeit, sometimes you may have to reload more than once, which is extremely frustrating to deal with.)