form action: array of object return null with formData

Link to the code that reproduces this issue

https://www.google.com

To Reproduce

I have a form with a multi select options. So when selected, it should get an array of object

Create a form component with its schema like this:
```
'use client';
```

import { useForm, FormProvider } from 'react-hook-form';

import MultiSelectField from '@/components/forms/fields/MultiSelectField';

// -------------------------------------- // // ----------- Select options ----------- // // -------------------------------------- // const categoriesOptions = [ { label: "Science", value: "science" }, { label: "Geopolitics", value: "geopolitics" }, { label: "Sports", value: "sports" } ]

const ArticleForm = () => { const form = useForm();

const action = (values: FormData) => { console.log('categories: ', values.get("categories")); // it returns null }

return ( <FormProvider {...form}> <form action={action}

); };

export default ArticleForm;


2. Select a list of categories
3. Click on save
4. See the log in the browser console

### Current vs. Expected behavior

Currrent behavior:
`null`

Expected behavior
```javascript
[
  {
    label: "Science",
    value: "science"
  },
]

Provide environment information

Operating System: Windows 10
Node: 18.17.0
Yarn: 1.22.21
next: 14.0.2
react: 18.2.0
react-dom: 18.2.0
typescript: 5.2.2
react-hook-form: 7.49.3

Which area(s) are affected? (Select all that apply)

App Router

Which stage(s) are affected? (Select all that apply)

next dev (local), next build (local), next start (local)

Additional context

No response

We could not detect a valid reproduction link. Make sure to follow the bug report template carefully.

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I did not open this issue, but it is relevant to me, what can I do to help?

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I think my reproduction is good enough, why aren't you looking into it quickly?

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vercel / next.js