It seems that by adding the RadDockZone and the RadDock you have to change the Binding Container. Here is the code that I added to the MultipleValueResourcesControl.cs file and worked at my side:
SchedulerFormContainer container = (SchedulerFormContainer)(((BindingContainer.Parent).BindingContainer).Parent).BindingContainer;
Hope this helps.
All the best,
the Telerik team
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