BTW: This code (taken from the forum) reproduces the problem:

// Implicitly created undo records will be saved here
CompositeCmd composite = this.diagram1.UndoManager.StartComposite("Create group", true);
// Call methods that create undo records
ShapeNode node1 = diagram1.Factory.CreateShapeNode(0, 0, 130, 130);
ShapeNode node2 = diagram1.Factory.CreateShapeNode(0, 0, 30, 30);
Group g = diagram1.Factory.CreateGroup(node1);
g.AttachProportional(node2, 10, 10, 40, 40);
// Save the active composite in history
composite.Execute();
node1.SubordinateGroup.AutoDeleteItems = true;

If i delete the group and invoke Undo, child element is behind node2, and i have to click it to bring it forward

Thanks Stoyan,
Since i don't call Nodes.Remove() programmatically but i use FlowChart default behavior, is there a way to inject those statements or do i have to intercept Delete key and add the code myself?

Corrado

Thanks Stoyan,
I'll have a look at it.