virtual columns experimental can not scroll smoothly when nearing the end

[moecasts]

TanStack Table version

8.21.3

Framework/Library version

React 18.3.1

Describe the bug and the steps to reproduce it

reproduce: https://tanstack.com/table/v8/docs/framework/react/examples/virtualized-columns-experimental?panel=sandbox

When the horizontal scrollbar is scrolled near the end (around column 998 in this demo), the scrollbar flash and makes it difficult to scroll smoothly to the final position.

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

https://stackblitz.com/github/tanstack/table/tree/main/examples/react/virtualized-columns-experimental?embed=1&theme=light&preset=node&file=src/main.tsx

Screenshots or Videos (Optional)

2025-05-14.15.08.20.mov

Do you intend to try to help solve this bug with your own PR?

No, because I do not know how

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.