RadioButton label width within stack severely constrained

[DavidPressman]

Unless I add additional properties, RadioButton width is severely constrained, no matter how long the text is or the width of a parent border control. To get all text I have to set both MinimumWidthRequest and employ a scrollview with horizontal orientation. Neither should be necessary, Example:

                                <Border Grid.Column="0" Grid.Row="1">
                                    <ScrollView Orientation="Horizontal">
                                        <VerticalStackLayout RadioButtonGroup.GroupName="SendGroup">
                                            <Label Text="{Binding SendUsing}" HorizontalOptions="Start" />
                                            <RadioButton CheckedChanged="SendGroup_CheckedChanged" Content="{Binding BoxC}" Value="0"
                                                     FontSize="Small" MinimumWidthRequest="500"/>

Note: Issue seen in Preview 12. Unable to try new Preview 13 yet as two third-party control suites I use in app are not yet compatible with it.