Issue: After kendo grid filter initialization, iframe is not

Hi,

I am using iframe dialogue of jquery-ui in my page. My page also includes kendo grid. Normally, iframe opens while there is no filter initialization in kendo grid.  But after clicking on any of the filter icon of kendo grid it initializes the filter menu which actually do something which i am unable to detect. Now If I try to open the iframe it does not open. Please suggest something. It's a blocking issue for me. I attached the demo for the same.

Thanks!!!