У вашего броузера проблема в совместимости с HTML5
For those who didn't know about it.
The cursor basically spins around the path it should take, radius being a little smaller than the hitcircle radius. In linear sliders it just goes in a straight line through the center of the slider.
Slower recording, so you know what is going on: https://youtu.be/EllFlqG5Rjc