Is it possible to make partial reloads with two different merged props but only reloading one?

[gordanielyan]

Question about Inertia::defer and router.reload({ only: [...] }) behavior

Hi all,

In my Laravel controller, I'm using Inertia::defer() with deepMerge() like this:

public function show(Request $request, Child $child)
{
    return Inertia::render('some-page', [
        'merge1' => Inertia::defer(fn() => $this->getPaginatedData1($request))->deepMerge(),
        'merge2' => Inertia::defer(fn() => $this->getPaginatedData2($request))->deepMerge(),
    ]);
}

In the frontend, I have the following code to load more data for merge1:

<Button
    onClick={() => {
        router.reload({
            only: ['merge1'],
            data: {
                page1: page1 + 1,
            },
            preserveUrl: true,
        });
    }}
>
    Load More
</Button>

However, when I trigger this reload, I get an error related to a component that uses the merge2 prop, even though I'm only reloading merge1.

My question is:
Is this expected behavior with deferred props and only?
Should I be handling this differently, or is this a potential bug?

Thanks in advance!