The Get List Item Object function has been removed so that part is not needed any more.
If you get crashes when adding items to the listview, make sure the same instance is not added twice or more, that will cause a crash. Check your crash log, if it says something like below, then that is the cause.
LogSlate: Warning: WidgetMapToItem length (5) does not match ItemsWithGeneratedWidgets length (4). This is often because the same item is in the list more than once in ListViewT<ItemType>[ListViewBase.h(216)]. Diagnostics follow.
LogSlate: Warning:
LogSlate: Warning: ItemToWidgetMap :
LogSlate: Warning: 0xb1596b00 -> 0xacb0b010 @ ObjectTableRowT[ListViewBase.h(472)]
etc.