ExtJS 4.2 Grid Cell Editor Focus Issue

Hi,

I am using ExtJS version 4.2.2

Using text area editor in grid with cell editor. By clicking "ADD" button from tool bar it adds row to grid & start editing. Whenever scroll bar appears, text area moves out of cell. without scroll bar it works fine. Is there any possible solution/work around available to handle scroll bar issue.

Please refer fiddle for the same.

ExtJS 4.2 Grid Cell Editor Focus Issue