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Hi I have a TreeView with nodes builded with ExpandeMode = ServerSideCallback
also the treeView alows Drag And Drop
the bug accurs when I drop a node into another node which is not populated yet then I try to expand another node to populate its sub nodes!
On debuging I cant go to the function : protected void TreeView1_NodeExpanded(object sender, Syncfusion.Web.UI.WebControls.Tools.TreeViewNodeEventArgs e)