I use a ribbon group which has different contents, depending of a Context Property, see excerpt below:  

<igRibbon:RibbonGroup ItemsPanel="{StaticResource ItemsViewPanel}">
        <GroupBox Content="{Binding Path=Layout.LayoutParameters}"/>
</igRibbon:RibbonGroup>

The Static resource is
<ItemsPanelTemplate x:Key="ItemsViewPanel">
           <igRibbon:ToolHorizontalWrapPanel  IsItemsHost="True" />
</ItemsPanelTemplate>
And the DataTemplate for the Binding Property is:
<DataTemplate DataType="{x:Type MyType}">
        <igRibbon:ToolHorizontalWrapPanel>
            ....

The Behaviour is, that changes of the Bound Property results in an error if the value is reset .