I understand from this http://www.telerik.com/forums/parentrow-problem that it is an expected beahvior.
I can't disable virtualization as it leads to performance issues.
I might have huge tree items in my application and i'm trying the locate the parent row on left arrow key down (the parent item will not be in visible area).
I cannot get the parent object as this is common behavior implemented in common library.
Please let me know if there is any other workaround.