Data Binding is not working on a Customcontrol

Question

I’m trying to make a custom control that inherits from Textbox look like this:

public class FieldControl : TextBox
{
    static FieldControl()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(FieldControl), new FrameworkPropertyMetadata(typeof(FieldControl)));
    }

    public static readonly DependencyProperty HeaderProperty =
            DependencyProperty.Register
            (
                nameof(Header),
                typeof(string),
                typeof(FieldControl),
                new PropertyMetadata(string.Empty)
            );

    public string Header
    {
        get { return (string)GetValue(HeaderProperty); }
        set { SetValue(HeaderProperty, value); }
    }
}

And in a dictionary of resources I have this:

<Style TargetType="{x:Type controls:FieldControl}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type controls:FieldControl}">
                <StackPanel>
                    <TextBlock Margin="2" Text="{TemplateBinding Header}" />
                    <TextBox Text="{TemplateBinding Text}" />
                </StackPanel>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

The problem is that when performing a data connection to the Text property, I do not receive notifications for Inotifypropertychanged in the view model.

<controls:FieldControl Header="Nome:" Text="{Binding Nome, UpdateSourceTrigger=PropertyChanged}" />

What I’m doing wrong?

My Viewmodel implements Inotifypropertychanged and if I use a common Textbox I get the notifications correctly, which confirms that the problem is related to my control.