notFoundComponent bubbles up regardless, why?

I've tried specifying

defaultNotFoundComponent

defaultNotFoundComponent

in the router, and also instead defining

notFoundComponent

notFoundComponent

_root.tsx

_root.tsx

. When I

throw notFound()

throw notFound()

inside a sub-route's

beforeLoad

beforeLoad

, it bubbles up, instead of rendering that sub-route's

notFoundComponent

notFoundComponent

, why?