kartik select2 in kartik gridview pjax

Hi, i am using kartik gridview. In the gridview i use kartik select2 as filter for some column. Everything works well.

Then i enable pjax for kartik gridview. The select2 filter seems ok at first. But after applying a filter on any column, doesnt matter the one with select2 or not, gridview pjax load the result, after that select2 filter only show loading animation.

Please help me fix this.