How to properly use external deferred data loading

[luixo]

Hello,
I'm trying to replicate an example from the docs (added here).

It seems like I'm missing the point, but what's happening in the example is:
SSR / loader:

• kick off the slow query and ignore the result
• kick off the fast query and wait the result
  SSR / router:
• dehydrate the queryClient (consists only of await fast query data) to the TSR inline data
  CSR / router:
• hydrate the dehydratedState to local queryClient (with fast query only)
  CSR / component:
• fast query renders in success state as it exists in the query cache
• slow query renders in pending state (aka fallback in Suspense) as it does not exist in the query cache
• slow query runs queryFn again (it was already run SSR in SSR / loader section), gets the data, renders success state

In this case server never inlines the slow data retrieved later, it is basically ignored.
It seems like we need to return Promise from the loader to make it work as well asuse the promise on CSR until it is resolved to make use of inline data.

Am I missing something?