Editable combo box within a ListView's DataTemplate needs to be edited twice for the change to take effect

[PankajBhojwani]

Describe the bug

When using a ListView with a datatemplate that represents the items in editable combo boxes, the first time a custom value is entered into the combo box the custom value gets reset to the previous value. This only occurs if the custom value is overwriting a 'preset' value, it does not occur if the custom value is overwriting another custom value. The GIF explains this better.

Steps to reproduce the bug

Create a ListView in XAML like this:

            <!--StringVector is a vector of string values-->
            <ListView ItemsSource="{x:Bind StringVector}">
                <ListView.Resources>
                    <!--PresetCVS is the vector of preset allowed string values, for the combo box dropdown-->
                    <CollectionViewSource x:Key="PresetCVS"
                                          x:Name="PresetCVS" />
                </ListView.Resources>
                <ListView.ItemTemplate>
                    <DataTemplate x:DataType="x:String">
                        <ComboBox IsEditable="True"
                                  IsSynchronizedWithCurrentItem="False"
                                  Text="{Binding}"
                                  ItemsSource="{Binding Source={StaticResource PresetCVS}}">
                        </ComboBox>
                    </DataTemplate>
                </ListView.ItemTemplate>
            </ListView>

In the code behind, initialize StringVector as an observable vector of strings, and populate PresetCVS with some 'preset' allowed string values. For example, this is what I did in c++:

        _PresetList = winrt::single_threaded_observable_vector<winrt::hstring>();
        _PresetList .Append(L"thisIsAPreset");
        _PresetList .Append(L"thisIsAnotherPreset");
        PresetCVS().Source(_PresetList);

        _StringVector_= winrt::single_threaded_observable_vector<winrt::hstring>();
        _StringVector_.Append(L"thisIsACustomValue");
        _StringVector_.Append(L"thisIsAPreset");

Then, run the application and try to edit the combo box that contains the preset value. Upon first try, the new value gets 'reset' to the previous value. Upon second try, the edit goes through successfully. This issue does not exist when editing the combo box that already contains a custom value.

Expected behavior

The change should go through upon the first try.

Screenshots

NuGet package version

None

Windows version

Windows Insider Build (xxxxx)

Additional context

No response