Yes, indeed. I am getting slowdowns using a Logitech G502 Hero Gaming mouse.
Everything Most is fine with an old Cherry MC 2000 mouse (no gaming, just 2 buttons and a wheel).
Still, even if I use the normal mouse in AmiBench, the mouse pointer stops after moving the mouse quickly. If I move the mouse slowly, the mouse pointer smoothly goes from left to right edge (or the other way round). If I move the mouse quickly, the mouse pointer moves a bit (~1/3rd of the screen) and then simply stops although I move the mouse further in the same direction. Something is still off.