[TreeView] toggleExpanded(row) for middle node seems faulty

To reproduce:

Have two top level nodes (probably does not matter how many top level).
Expand the first node. (root and children are are shown)
Expand one of the children. (root, children and grandchildren are shown)
Expand one of the grand children. (root, children, grandchildren, great grand children are shown)
Toggle a the child with two levels below expanded.

Expected behavior:

• The child is collapsed

Actual behavior:

• Child is not collapsed and weirdly the grand children are duplicated

Please let me know if you are not able to reproduce and I will try to create a sample.