DefaultNotFoundComponent renders always even if root component has notFoundComponent defined

[Gep93]

Router's notFoundMode is left default (fuzzy).

Example folder structure:

__root.tsx (notFundComponent defined)
_dash
    _protected.tsx (has Outlet)
    _protected
        about.tsx
_dash.tsx (has Outlet)

the path to the protected page in above structure is: /about. It contains a link to a non existent page: /about/test. As far as I understand, this should render notFoundComponent in __root.tsx but it renders defaultNotFoundComponent defined in the router instance.

Am I missing something?

Link to repro:
https://codesandbox.io/p/devbox/zealous-snyder-rdpxkl?workspaceId=ws_QnR4c4yxvqYer3MvhFWX9c