404 is not bubbling up to the root when loader is present #2547

Which project does this relate to?

Router

Describe the bug

I have notFoundComponent on root component, and I'm throw notFoundError() on child component.

Instead of showing root's defined 404, the fallback 404 is shown with a warning:

A notFoundError was encountered on the route with ID "${route.id}", but a notFoundComponent option was not configured, nor was a router level defaultNotFoundComponent configured. Consider configuring at least one of these to avoid TanStack Router's overly generic defaultNotFoundComponent (<div>Not Found<div>)

This is happens, when there is a beforeLoad or load on root router. If I remove them, it works as expected

Your Example Website or App

https://stackblitz.com/edit/github-waadja-f2kpdp?file=src%2Froutes%2F__root.tsx

Steps to Reproduce the Bug or Issue

1. Open demo app
2. Click on About

Expected behavior

Message Root not found (EXPECTED)

Screenshots or Videos

Platform

• OS: [e.g. macOS, Windows, Linux]
• Browser: [e.g. Chrome, Safari, Firefox]
• Version: [e.g. 91.1]

Additional context

No response