Treetable not showing tree when click from the same datatable row second time

I am new to webix. I have an issue that I have been trying to figure out using ‘treetable’ in conjunction with datatable. It is working properly the first time the row on the ‘datatable’ is clicked and the treetable is showing data correctly. But, after clicking another row from ‘datatable’ and click back on the previous row clicked, the ‘treetable’ is gone. It is just showing the parent name and no children.
What could be missing from the code?

Here is the sample code: http://webix.com/snippet/802dd5bb

Thank you.

Hierarchical components will destroy data object during data loading ( they reconstruct it to the plain structure ). If you need to reuse data object, wrap it in “webix copy”

http://webix.com/snippet/30d3f7f4

Hi Maksim,

Great!! Thank you. This is what I have been looking for.