How to change element in ItemsSource without also changing SelectedIndex

[mkj-stonehill]

I've got an application using Avalonia 11.2.7. I have a ListBox:

      <ListBox ItemsSource="{Binding ModuleList}" SelectionMode="Single" SelectedIndex="{Binding SelectedModule}" >
        <ListBox.ItemsPanel>
          <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal" />
          </ItemsPanelTemplate>
        </ListBox.ItemsPanel>
      </ListBox>
    </StackPanel>

If ModuleList is an ObservableCollection<string>, then if I change the string for the currently selected item like this:

ModuleList[SelectedModule] = "some new string";

Then I find that SelectedModule gets changed to -1 (meaning I lose the current selection).

If I change ModuleList to a simple List<string>, I can change the selected item, but the ListBox does not update on the screen, even if I include a call to RaisePropertyChanged(nameof(ModuleList)).

Is there any way to accomplish this? In other words, I'd like to update the string displayed for the selected item, without losing the current selected index value.

[thevortexcloud]

There is currently a fairly relevant PR open which might be worth looking at.

#18634