When drag and drop a node at more than 1 level from bottom to top direction, the root node is duplicated at the bottom of the TreeViewAdv. However, this issue does not occur when dropping a node at 1 level higher than the dragging node's position
1.Run the sample.
2.Drag the Test5 node.
3.Drop it on the Test3 node.
4.Note that the Test1 node is duplicated at the bottom.