Checkbox loses focus with FocusManager.IsFocusScope="True" <p>I see strange behavior with my <code>CheckBox</code> and its focus/tab order.</p> <p>First some "working" code:</p> <pre><code>&lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition /&gt; &lt;RowDefinition /&gt; &lt;/Grid.RowDefinitions&gt; &lt;Button Grid.Row="0" Width="100" Height="25"/&gt; &lt;TabControl Grid.Row="1" &gt; &lt;!--TabItem Header="tabItem1" Name="tabItem1"--&gt; &lt;TabItem Header="tabItem1" Name="tabItem1" FocusManager.IsFocusScope="True"&gt; &lt;ScrollViewer&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition /&gt; &lt;RowDefinition /&gt; &lt;RowDefinition /&gt; &lt;RowDefinition /&gt; &lt;/Grid.RowDefinitions&gt; &lt;TextBox Grid.Row="0" /&gt; &lt;TextBox Grid.Row="1"/&gt; &lt;CheckBox Grid.Row="2" Content="Test" /&gt; &lt;TextBox Grid.Row="3"/&gt; &lt;/Grid&gt; &lt;/ScrollViewer&gt; &lt;/TabItem&gt; &lt;/TabControl&gt; &lt;/Grid&gt; </code></pre> <p>If you try this, the tab order works fine - as long as you do not check the CheckBox. If I check the CheckBox it loses focus and the next tab press sets the focus to the Button.</p> <p>If I remove <code>FocusManager.IsFocusScope="True"</code> all works fine.</p> <p>My question is this behavior wanted or a bug?</p>