[experimental] Node.removeChild: The node to be removed is not a child of this node

I'm using `@dnd-kit/react/sortable` with multiple sortable lists (i.e. multiple groups) and the `OptimisticSortingPlugin`.

Whenever I move an item from one group to another and then try to commit the changes in `onDragEnd` by updating React state I get the following error:

```
DOMException: Node.removeChild: The node to be removed is not a child of this node
```

It seems that React doesn't like that the DOM was modified outside of React. Is there any way to undo the optimistic changes right before calling `setState()`?

The only two differences I see between my code and the [sandbox examples](https://codesandbox.io/p/sandbox/5qwvjf) are:

1. Different React version
2. I'm updating state in `onDragEnd` instead of `onDragOver`. Is this approach not supported?

My React version is `18.3.1` and @dnd-kit/react is `0.1.19`.

Start with the linked CodeSandbox and compare its onDragOver flow with the reported React 18.3.1 and @dnd-kit/react 0.1.19 setup, focusing on OptimisticSortingPlugin and onDragEnd. Reproduce a cross-group move followed by a state update, then establish whether this usage is supported and what behavior prevents the DOMException.

Written by the indexing model from the issue text.