(Gameplay) Vi Q will stop activating half way through a game.

I will be playing a game, and Vi's Q will stop activating half way through it.

This bug happens seemingly at random, however it hasn't happen mid team fight as of yet. I will usually notice it when i have backed to base. The Q will no longer activate, and make an audible sound when i attempt to activate it. My Q key also works in chat as normal. The issue will persist for the remainder of the game. The issue has been resolved on the next game I play for every time it has occurred. The issue is also fairly rare, and only happens maybe 1 out of 7 games. I have no idea how to reproduce the issue.