RAZER Tartarus V2 Joystick sometimes keeps going

I use the joystick of the RAZER Tartarus V2 to move. I assigned wasd to the buttons. It works most of the time, but sometimes, about once every 15 minutes I keep moving, although I released the bottons. E.g: When I use the front button of the joystick (which I assigned w to) and stop pressing it, it then lets my char further going on infinitely, untill I press the button again. I have the same problem with the left and right buttons of the joystick. (I assume also with the back button, but it hasn't occured so far, since I use it not often). Is there anything I could do to fix this, or any log I could provide (if you tell me how)? It is a very annoying bug which kills my char from time to time. To complete the info: I play WoW.