I have the same issue with my corsair harpoon rgb wireless too. Firmware 1.9.85 . I bought it one month ago but as I live in Madagascar I can not send it back to Europe where I buy it. I was thinking of opening the mouse, but do you guy think it's the firmware and if corsair will repair the firmware later. I have a corsair PSU RM550x, a Corsair Keyboard K57 Wireless RGB. Very happy with them but not with this mouse.