File Block:Adding a custom style to a file block will register two upload files.

[imawc]

Description

If you add a custom style to the file block with register_block_style(), two upload files will be registered.

Step-by-step reproduction instructions

1. Register a custom style in the file block with register_block_style()
2. Upload a file in the file block
3. Checking in the media, two files are registered.

Expected behaviour

Register only uploaded files.

Actual behaviour

Duplicated files will be registered at the same time.

Screenshots or screen recording (optional)

Code snippet (optional)

WordPress information

• WordPress version: 5.7.2
• Gutenberg version: Not installed
• Are all plugins except Gutenberg deactivated? Yes
• Are you using a default theme (e.g. Twenty Twenty-One)? Yes

Device information

• Device: Desktop
• Operating system: Mac OS X 11.3.1
• Browser: Chrome 90.0.4430.212

[Mamaduka]

I was able to reproduce the issue.

Example code for custom File block style:

add_action( 'init', function() {
    register_block_style(
        'core/file',
        [
            'name'  => 'file-test-style',
            'label' => 'File test style'
        ]
    );
} );

[imawc]

@Mamaduka
Ah, so it was a bug after all.
Thanks for reproducing the test.