Tabs are disabled when using datatemplate for viewmodel in window content

[dstarman99]

When referencing a viewmodel in the view, only the active tab's buttons are enabled. All other functions seem to be disabled: backstage, tabs, collapse, etc.

To duplicate the problem, in the TestWindow.xaml, replace the following code and run the test project:

<FluentTest:TestContent x:Name="TestContent" />

With:

<DataTemplate DataType="{x:Type viewModels:MainViewModel}">
&lt;FluentTest:TestContent /&gt;

</DataTemplate>

</Window.Resources>

<viewModels:MainViewModel></viewModels:MainViewModel>