[GAMEPLAY] Can't left click or move camera

At the beginning of a game (any game, bots, PvP, ARAM) I can't left click or or move my camera.

1. Let your game disconnect and then reconnect
2. Try to buy something, maybe able to left click after clicking 50 time
3. Move your mouse to move the camera, watch it go no where

This happens almost every time when I start playing. But after it happens once, it wont happen again (until you disconnect) I have a Mac. Don't know if that's helpful.

If I force my computer to shut down I can re-enter the game and I won't have this problem.

The upsetting part is, that that LoL is punishing me for idleness. Hope it gets fixed