While playing a match in the Omnipath draft event my cursor began to drift on screen. At first thought it was an issue with my mouse but after tabbing out saw that wasn't the case, and as the game progressed it periodically got worse and worse until it was impossible to play at all as my clicks didn't register anymore, and as a result cost me my first loss out of three I'm allowed in the event, very frustrating overall as I've tested it out in bot matches after and saw the issue persisted both in game and in the menu screens. Hope to see this issue fixed soon as I wouldn't have paid into the event till it was.