GroupBox shortcuts and triggers do not work, the same triggers work on the StackPanel

Question

I have a set of triggers in the form of XAML, and for life I can’t understand why one set works and the other does not, despite the fact that it is associated with the same variable.

First, triggers that work:

<StackPanel Orientation="Vertical" Margin="25,0,0,0">
    <StackPanel.Style>
        <Style TargetType="{x:Type StackPanel}">
            <Setter Property="IsEnabled" Value="False" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding GorOption.InternalName}" Value="Separator">
                    <Setter Property="IsEnabled" Value="True" />
                </DataTrigger>
            </Style.Triggers>
        </Style> 
    </StackPanel.Style>
</StackPanel>

<StackPanel Orientation="Vertical" Margin="25,0,0,0">
    <StackPanel.Style>
        <Style TargetType="{x:Type StackPanel}">
            <Setter Property="IsEnabled" Value="False" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding GorOption.InternalName}" Value="BubblePoint">
                    <Setter Property="IsEnabled" Value="True" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </StackPanel.Style>
</StackPanel>

This trigger works beautifully. Now I have GroupBox and Label with very similar triggers that don't work at all. Triggers that do not work:

<GroupBox Header="Recombined Gas" Grid.Row="1" Grid.ColumnSpan="2">
    <GroupBox.Style>                
        <Style TargetType="{x:Type GroupBox}">
            <Setter Property="Header" Value="Recombined Gas" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding GorOption.InternalName}" Value="Separator">
                    <Setter Property="Header" Value="Separator Gas" />
                </DataTrigger>
                <DataTrigger Binding="{Binding GorOption.InternalName}" Value="BubblePoint">
                    <Setter Property="Header" Value="Dissolved Gas" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </GroupBox.Style>
</GroupBox>

And the label trigger does not work:

<Label Content="Reombined GOR" Width="90">
    <Label.Style>
        <Style TargetType="{x:Type Label}">
            <Setter Property="Content" Value="Recombined GOR" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding GorOption.InternalName}" Value="Separator">
                    <Setter Property="Content" Value="Separator GOR" />
                </DataTrigger>
                <DataTrigger Binding="{Binding GorOption.InternalName}" Value="BubblePoint">
                    <Setter Property="Content" Value="Dissolved GOR" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Label.Style>
</Label>

, - , . , . , DataTrigger, ? , , , . - Label GroupBox?

Answer 1

Nevermind, . , " ". , ...

, Content Header XAML, , - . , - WPF, , , .