I think this is happening because you are committing the object with refresh on page. When you do this, the focus is set to the widget on the page with the lowest Tab Index. Try changing the page so that the text box above has the lowest tab index among all of the widgets on the page and see if that resolves the issue.
Hi Raju,
Change tab index of text area box to 0 and reset of all widget on page make it higher or lower than 0. Then application will be focus on your desired field.
Thanks