`ArrayInput` keeps bringing back removed item when `keepDirtyValues` is set to `true`

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**What you were expecting:**

When the following conditions are met:
- React Strict Mode is enabled
- Records are modified by the backend each time they are updated (e.g. to add an `updated_at` field)
- `` has `redirect={false}`
- `` has `mutationMode="optimistic"`
- `` has `resetOptions={{ keepDirtyValues: true }}`

I should be able to remove items from an ``.

**What happened instead:**

Instead, the removed item keeps reappearing after I click Save.

https://github.com/user-attachments/assets/a63664e4-7126-48ec-827d-6c700daede27

**Steps to reproduce:**

1. Open https://stackblitz.com/edit/github-ds11wg7c?file=src%2Fposts%2FPostEdit.tsx
2. Click on Post with id 13
3. Add a new item
4. Save
5. Remove item
6. Save
7. Notice the removed item came back!

**Related code:**

https://stackblitz.com/edit/github-ds11wg7c?file=src%2Fposts%2FPostEdit.tsx

**Other information:**

I also tried to reproduce this issue in a react-hook-form only sandbox, but it does not seem to have the issue.
https://codesandbox.io/p/sandbox/sweet-rhodes-nn7nl8?workspaceId=ws_GvfcTzCi2aJ7bCaQr5bmfV

**Environment**

* React-admin version: 5.4.2
* Last version that did not exhibit the issue (if applicable):
* React version: 18
* Browser: Chrome
* Stack trace (in case of a JS error):

Start with the linked StackBlitz reproduction, especially src/posts/PostEdit.tsx, and reproduce the sequence with React Strict Mode, optimistic mutation, redirect={false}, and keepDirtyValues. Trace the interaction between Edit, Form, and ArrayInput after the second save; done means a removed item stays removed under the reported conditions.

Written by the indexing model from the issue text.