useTreeData getItem for the child returns undefined after moving the parent node

[gensakusiya]

Provide a general summary of the issue here

The getItem() function returns undefined for each child in the moved parent node within the root.

🤔 Expected Behavior?

The getItem() function returns the child after moving the parent node.

😯 Current Behavior

getItem() returns undefined

💁 Possible Solution

Add all removed children in nodeMap for the moved node in the moving function (probably here)

🔦 Context

No response

🖥️ Steps to Reproduce

const tree = useTreeData({
  initialItems: [
    {
       id: 1,
       children: [],
     },
     {
        id: 2,
        children: [],
     },
     {
        id: 3,
        children: [
          {
             id: 30,
             children: [],
          },
          {
             id: 31,
             children: [],
          },
        ],
     },
  ],
  getKey: (item) => item.id,
  getChildren: (item) => item.items,
});

tree.getItem(31) // return node:31
tree.move(3, null, 0)
tree.getItem(31) // return undefined

Version

react-stately: 3.36.1

What browsers are you seeing the problem on?

Chrome

If other, please specify.

No response

What operating system are you using?

macOS

🧢 Your Company/Team

No response

🕷 Tracking Issue

No response

[snowystinger]

Thanks, I was able to reproduce in a unit test, I've fixed it in #7854 which should be pulled into our tree drag and drop pr