Sometimes it randomly occurs, that the changing sound is not working as expected. I inverted the scrolling of my touchpad so when I go down with my fingers the page goes up. This is also the case with the volume. When I put my cursor over the volume and go up with my finger the music gets louder. But sometimes it is just other way around, while the rest of the scrolling (like the browser) is still inverted. This is very annoying because in case you want the tone gone very fast, you make it very loud, very fast.

Im not that technically experienced so I need some help to locate this bug.