Proper way of using Inertia Deferred props

[ChrisToxz]

What is the right way to use laravel-data with Inertias V2 Deferred props?

When I do:
songs' => Inertia::defer(fn () => SongData::collect(Songs::all()),

The data is available in the front end, but I'm unable to loop over it.
I'm using React and it says that map is undefined.

When I return the plain results like songs' => Inertia::defer(fn () => Songs::all()),
The Deferred props works like a charm, and I can loop over the results.

[ChrisToxz]

Got it working by double checking songs exists.
However it doesn't seems the way it should, is it a bug, or am I doing something wrong?

   <Deferred data="songs" fallback={<div>Loading...</div>}>
         {songs && songs.map((song) => (
         //etc
                    ```