Ext Js 3 - Rows are misaligned in locked grid in IE9 while scrolling

Hello,

I am using LockingGroupingGridView plugin to created locked grid. But while scrolling the grid, rows of locked grid are misaligned with unlocked grid.

I checked the online example as well given at below link :

http://ift.tt/1FNznRO

and it showed misalignment. Please find attachment.

Could you please guide on this?

Ext Js 3 - Rows are misaligned in locked grid in IE9 while scrolling