Textbox control have hidden focus

[elesh9]

Test Project
Visual studio 2015
MahApps.Metro.1.2.0.0
.Net Framework - 4.6

MetroWindow.xaml

<controls:MetroWindow x:Class="WpfApplication.MainWindow"
                      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                      xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
                      Title="MainWindow"
                      Height="600"
                      Width="800">
  <Grid>
     <Label x:Name="label" Content="Label" HorizontalAlignment="Left" Margin="81,42,0,0" VerticalAlignment="Top"/>
        <Label x:Name="label1" Content="Label" HorizontalAlignment="Left" Margin="81,73,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="textBox" HorizontalAlignment="Left" Height="23" Margin="140,42,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120"/>
        <TextBox x:Name="textBox1" HorizontalAlignment="Left" Height="23" Margin="140,73,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120"/>
        <Button x:Name="button1" Content="Close" HorizontalAlignment="Left" Margin="277,127,0,0" VerticalAlignment="Top" Width="75" Click="button1_Click"/>


  </Grid>
</controls:MetroWindow>

namespace WpfApplication
{
  public partial class MainWindow : MetroWindow
  {
    public MainWindow()
    {
      InitializeComponent();
    }
private void button1_Click(object sender, RoutedEventArgs e)
        {
            Application.Current.Shutdown(1);
        }
  }
}

when put cursor in first textbox and press TAB key now cursor not show and cursor not shown.

[elesh9]

this bug occurred after MahApps.Metro-1.1.3-ALPHA252 version

[elesh9]

Thanks.