If a drag and drop reordering validation error occurs, a successful reorder duplicates the node

[robbieaverill]

Version: SS 4.3.0-rc1 (in CWP 2.2.0-rc1 context)

• Create a page
• Drag to reorder the page under a parent which won't allow it as a child (in CWP I'm dragging a Registry Page to be a child of a Event Holder page)
• Validation error is shown
• Drag the same page to underneath another valid page type (e.g. Page)

Reordering is successful, but the node is now duplicated in the tree:

Note that this issue multiplies every time the validation fails and is then reordered successfully again: