List view - selected item gets unselected on new row created

Hi,
I have a list view on a form, user can add new row (element of list view) with button press. In each element I have a select box to select some data this selection is required field. When I select something and then add new list view items all selected items are gone and it's saying to select again.

How to do this properly ? Thanks

adding item keys solved the issue:
{{_.range(itemListView2.instances)}}