useWindowVirtualizer with measureElement breaks scroll restoration

运行 CodeSandbox 复现，并比较有和没有被注释掉的 scrollToFn 选项时的导航行为。跟踪列出的导航步骤中 useWindowVirtualizer、measureElement、重新测量和滚动恢复之间的交互；当列表无需 workaround 即可返回顶部时，即表示完成。

Describe the bug

When using
"@tanstack/react-virtual": "3.13.8"
and
"@tanstack/react-router": "1.112.12"

If the page contains a virtualized list like this:

  const virtualizer = useWindowVirtualizer({
    gap: 16,
    overscan: 4,
    count: data.items.length,
    estimateSize: constant(188),
    scrollMargin: listRef.current?.offsetTop ?? 0,
  });

And the items use:

              ref={virtualizer.measureElement}
              data-index={index}

But the actual element sizes differ from estimateSize, triggering re-measurement on mount — in that case, scrollRestoration breaks.

This might be an issue on the @tanstack/react-router side; I’ll duplicate this issue there as well.

Current workaround: add this option to the virtualizer:

scrollToFn: () => null,

Your minimal, reproducible example

https://codesandbox.io/p/sandbox/2lryyk

Steps to reproduce

1 Open the Home page
2 Scroll down a bit
3 Navigate to the List page
4 You'll notice that the page is not scrolled to the top

In the code, there's a commented line:

in code there are commented string with
scrollToFn: () => null

Uncommenting this line.
After doing that, navigation with scroll restoration works perfectly.

Expected behavior

Virtualizer does not break scroll restoration.

How often does this bug happen?

Every time

Screenshots or Videos

No response

Platform

maxOS

tanstack-virtual version

3.13.8

TypeScript version

5.7.3

Additional context

No response

Terms & Code of Conduct

• I agree to follow this project's Code of Conduct
• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.