Leblanc spell range indicator when using W>Q>R it shows W spell range indicator

When using W and Q>R really fast it shows W indicator which is really annoying because i dont know if im casting Q or W at that point and can throw me off in intense 5v5 fights etc... this bug is game breaking and i dont know why it hasnt been fixed yet, it has been there since i started playing in season 3...

https://www.youtube.com/watch?v=GE27DIm_uh8&feature=youtu.be heres a video of the bug in action.