DataGridComboBoxColumn not editable

Describe the bug

<DataGridComboBoxColumn Header="Anrede"
                        SelectedItemBinding="{Binding Salutation, Mode=TwoWay}"
                        ItemsSource="{Binding Source={StaticResource AvailableSalutations}, Mode=OneWay}"
                        Width="100"/>

I tried adding this DataGridComboBoxColumn to a ui:DataGrid and it shows the right value but I can't edit it.
Workaround:

<DataGridTemplateColumn Header="Anrede">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <ComboBox ItemsSource="{Binding DataContext.ViewModel.AvailableSalutations, RelativeSource={RelativeSource AncestorType=Page}, Mode=OneWay}"
              SelectedItem="{Binding Salutation, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
              IsEditable="False"
              Background="Transparent"
              BorderThickness="0"/>
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

To Reproduce

See examples in description.

Expected behavior

It is editable like every other column.

Screenshots

No response

OS version

Windows 11 24H2

.NET version

.NET Framework 4.8

WPF-UI NuGet version

4.0.2

Additional context

No response

Start with the DataGridComboBoxColumn behavior shown in the issue and compare it with the working DataGridTemplateColumn workaround. Reproduce the binding on Windows/WPF using the supplied XAML, then verify that editing and the TwoWay SelectedItemBinding work as expected; the payload names no source file or test.