When trying to edit the Design Data value of a property inside of a collection, an exception read access violation (this is nullptr) is thrown:

Gui.Editor.dll!Editor::DocumentObjectTreeItem::GetDocument() Line 70
at C:\Source\Noesis\NoesisEditor\NoesisSDK\Native\Src\Packages\Gui\Editor\Src\DocumentObjectTreeItem.cpp(70)
Gui.Editor.dll!Editor::Helper::FindPropertyPath(Editor::XamlDocument doc, Noesis::NodeObject node, unsigned int parents, Editor::DocumentObjectTreeItem customTreeItem) Line 599
at C:\Source\Noesis\NoesisEditor\NoesisSDK\Native\Src\Packages\Gui\Editor\Src\PropertyHelper.cpp(599)
Gui.Editor.dll!Editor::Helper::FindProperty(Editor::DocumentObjectTreeItem treeItem, Noesis::NodeObject node, Noesis::Symbol owner, Noesis::Symbol prop) Line 713
at C:\Source\Noesis\NoesisEditor\NoesisSDK\Native\Src\Packages\Gui\Editor\Src\PropertyHelper.cpp(713)
Gui.Editor.dll!Editor::UpdateDataContextPropertyCommand::Execute() Line 222
at C:\Source\Noesis\NoesisEditor\NoesisSDK\Native\Src\Packages\Gui\Editor\Src\UpdateDataContextPropertyCommand.cpp(222)
Gui.Editor.dll!Editor::ObjectPropertySource::ApplyValue(const Noesis::ArrayRef<Editor::PropertyUpdateRequest> & props, bool isLocalOnly, bool canAnimate) Line 431
at C:\Source\Noesis\NoesisEditor\NoesisSDK\Native\Src\Packages\Gui\Editor\Src\ObjectPropertySource.cpp(431)
Gui.Editor.dll!Editor::Property::OnSetValue(Noesis::BaseComponent * param) Line 643
at C:\Source\Noesis\NoesisEditor\NoesisSDK\Native\Src\Packages\Gui\Editor\Src\Property.cpp(643)