Sticky shift bug

When i get into a game, after a few minuts of normal gameplay, my shift gets sticky, it’s like some one is holding my shift down all the time, and i can’t play when it happens, i have tried to play on a another account, and then the problem will not occur, so it only on this account there is a problem, so it’s not my computer or my sc2 there is bugged but this account, what can i do to fix it?