• .NET Core Version: 5.0.100-rc.1.20420.14

• Have you experienced this same bug with .NET Framework?: Yes, tested in net472, netcoreapp3.1

Repro steps:

1. Create application with ListView.
2. Create ListViewGroup
3. Add ListViewItem to ListViewGroup
4. Add ListViewGroup to ListView.
5. Or use attached project WindowsFormsApp3.zip

Actual:
ListViewItem is not displayed in ListView because ListItemView.ListView = null. I think ListView should be set for item when we add group with this item to ListView.

As a result ListViewItem.AccesibleObject may either throw InvalidOperationException, when attempting to access an item which added to a group, but have not link to the listview (2), or have a stable/incorrect reference to the listview when its group is removed from the listview (3)

Expected:

1. ListViewItem is displayed in ListView, if added to a group which is then added to a listview.
2. ListViewItem has a reference to the listview, when a group is added to the listview
3. ListViewItem has a reference to the listview removed, when a group is removed from the listview

Notes:

   var group = new ListViewGroup("Test group");

   // this item is not shown in the listview, and doens't have reference to listview
   // i.e. item1.ListView = null
   ListViewItem item1 = new ListViewItem("You don't see me");
   group.Items.Add(item1);
   listView2.Groups.Add(group);

   // this items is shown in the listview, item2.ListView <-- listView2
   ListViewItem item2 = new ListViewItem("You see me", group);
   listView2.Items.Add(item2);