Validation error after deleting uploaded file using Filepond

[thannaske]

• Laravel Version: 10.48.10
• PHP Version: 8.2.12
• Splade JS Version (npm): 1.4.19
• Splade PHP Version (composer): 1.4.19
• Dev environment (OS, Sail/Valet/etc): macOS 14.4.1 (Sonoma), Laravel Valet

Description

When using the Filepond component for uploading multiple files there's an issue when the user removes a file that has already been uploaded. The validation of the subsequent request then fails with the following error:

The attachments.0 field must be a file.

This validation error is raised, although there should no attachment.0 field anymore at all. It seems like deleting a file from the Filepond UI doesn't result in the field being removed from the form payload.

The request validation on the backend looks like this (and works fine when uploading a file and then immediately submitting the form):

<?php

// [...]
use Illuminate\Foundation\Http\FormRequest;
use ProtoneMedia\Splade\FileUploads\HasSpladeFileUploads;

class MessageRequest extends FormRequest implements HasSpladeFileUploads
{
    // [...]   

    public function rules(): array
    {
        return [
            'attachments.*' => ['sometimes', 'file', 'max:102400'],
            // [...]
        ];
    }
}

Steps To Reproduce Issue

1. Create a simple form with the Filepond upload component
2. Point the form towards a controller that performs a input validation
3. Upload a file
4. Remove the file using the Filepond UI
5. Submit the form
6. Observe the validation error