Explanation

This uses inconsistant shorthand and causes Skrollr to error and stop working.

If you look in the developer tools, you'll see the error Uncaught Can't interpolate between "{?}px {?}px {?}px {?}px" and "{?}px" in the Console

<div class="box" 
		data-0000="padding: 0px 0px 0px 0px;" 
		data-2000="padding: 50px;"
></div>