In alpha 3 when we get dynamically data for selectmenu...for the first click selectmenu is not working

In alpha 3 when we get dynamically data for selectmenu...for the first click selectmenu is not working

iam getting data from json for the select menu...for the first click its  not opening..when i click back button and move again to same page and click select menu,then,its working....can any one suggest me?