Basilisk V2 command gets stuck even though button released

Hi, I'm playing an FPS with the mouse, and a command bound to the Sensitivity Stage Up -button gets stuck even though the button is released. First, the mouse seems to work properly, but after a while, when I hold down the button and release it, the command isn't released until later. I think this started to happen only recently. Maybe some update ruined it. This is a major nuisance, and I'm planning to return this faulty mouse.