Selected rows are deleted/removed when add/update items in grid

Whenever I'm trying to add a new row in grid and I have some rows selected , all selections are removed .

I think this is not a normal behaviour of a grid , and the selected rows should be kept if there are inserts/updates on the grid .

Do you have this problem ? Do you have a workarraound ?

Here is a plunker to ilustrate my problem : http://plnkr.co/edit/VAh56t?p=preview

Thanks

Start with the linked Plunker to reproduce the lost-selection behavior when adding or updating grid rows. Trace how the grid tracks selected rows during those operations, then verify that existing selections remain after inserts and updates using the same scenario.

Written by the indexing model from the issue text.