Jquery Checkbox Not Works On First Click

i use IOS Checkbox Style plugin but it not works right when you click for first time the style change currectly but checkbox not checked to do that you must click for second time and it will be okay

anyone can help me to solve this isue ?

plugin url: goo.gl/7oERq2

web site url: goo.gl/y9qgDf (you can see checkbox in login modal box)