When on an area of the slider without either button on the screen, a click in space sometimes doesn’t do anything. (Might have to do with number of pages away from the buttons)
Expected behavior: a click in valid space should move the yellow slider.
See gif (there is clicking happening after moving the page twice in a row)
Chromium Version 58.0.3029.110 Ubuntu 16.04 (64-bit) Firefx Version 54.0 Ubuntu 16.04 (64-bit)