Might be a bug : embedded X set does not work in constructor

<UserControl x:Class="Gauge.DigitalGauge"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:shared="http://schemas.actiprosoftware.com/winfx/xaml/shared"
    Height="170" Width="348" xmlns:gauge="http://schemas.actiprosoftware.com/winfx/xaml/gauge" Background="Transparent">
    <gauge:DigitalGauge x:Name="gauge" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Value="200"
                            CharacterCount="10" Foreground="Cyan" Background="Black" CharacterPadding="10,0" BackgroundType="RoundedRectangleLightGradient"
                        RimType="RoundedRectangleLightGradient" CharacterType="DotMatrix5By7Rectangle">
        <gauge:DigitalGauge.Items>
            <TextBlock x:Name="textBlock" gauge:DigitalGauge.X="0" gauge:DigitalGauge.Y="0" Text="Hello !"
                                    FontFamily="Courier New" Foreground="WhiteSmoke" FontSize="20" />
        </gauge:DigitalGauge.Items>

    </gauge:DigitalGauge>
</UserControl>

namespace Gauge {
    /// <summary>
    /// Logique d'interaction pour DigitalGauge.xaml
    /// </summary>
    public partial class DigitalGauge : UserControl {
        public DigitalGauge() {
            InitializeComponent();
        }

        public void setTextX(){
            textBlock.SetValue(ActiproSoftware.Windows.Controls.Gauge.DigitalGauge.XProperty, ActiproSoftware.Windows.Unit.Percentage(-50));
        }
    }
}

namespace Gauge {
    public class MainForm : Form {


        public MainForm() {
            InitializeComponent();
            //need to resize the form to see positioning
            ((DigitalGauge)elementHost1.Child).setTextX();
        }

        ElementHost elementHost1 = new ElementHost();
        DigitalGauge digitalGauge1 = new DigitalGauge();

        protected override void OnCreateControl() {
            base.OnCreateControl();
            //here it works immediately
            //((DigitalGauge)elementHost1.Child).setTextX();
        }

        private void InitializeComponent() {
            this.elementHost1 = new System.Windows.Forms.Integration.ElementHost();
            this.digitalGauge1 = new Gauge.DigitalGauge();
            this.SuspendLayout();
            // 
            // elementHost1
            // 
            this.elementHost1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.elementHost1.Location = new System.Drawing.Point(0, 0);
            this.elementHost1.Name = "elementHost1";
            this.elementHost1.Size = new System.Drawing.Size(275, 200);
            this.elementHost1.TabIndex = 0;
            this.elementHost1.Text = "elementHost";
            this.elementHost1.Child = this.digitalGauge1;
            // 
            // MainForm
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(275, 200);
            this.Controls.Add(this.elementHost1);
            this.Name = "MainForm";
            this.Text = "Form1";
            this.ResumeLayout(false);

        }
    }
}