JqGrid issue: Frozen and merging issue in IE9

JqGrid issue: Frozen and merging issue in IE9

Hi,

I am using JqueryGrid in which first column made frozen true and merge true. Now both frozen and merging values (same values) in a first column are working fine in IE10, IE11 and FF latest versions. 
when trying to test on IE9 its is not working. In IE9 frozen column is working fine, but merging is not working and same values are coming.
This issue found only in IE9 version.

Thanks
Vivek