Pager item coloring duplication

[IgorGu]

In every slider (also in examples on site) while using mobile device(Html 5 apps) ,after touching one pager item - as a result the slider changes, and coloring that pager- item.
Problem occurs after swiping with finger to right-left, the next pager-item painted as needed, but the previos touched item continues to be colored.

So you get 2 colored items...