Top margin of the image block is missing in TT2

[mayuge3]

Description

The top margin of the image block is missing in the TT2 front-end view when using the Gutenberg plugin.
It appears that the wp-block-styles (theme.css) is overriding the new global margin #47858.

In the editor, the top margin is available.

Step-by-step reproduction instructions

1. Create a post and add paragraph and image block.
2. Check the front-end view.

Screenshots, screen recording, code snippet

Front-end

Editor

Environment info

• WP 6.2
• Twenty Twenty 2
• Gutenberg plugin 15.7.1

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[ndiego]

I was able to replicate this issue as well but it does not occur in WordPress 6.2 without Gutenberg active.

The root issue appears to be related to the fact that TT2 registers the following support: add_theme_support( 'wp-block-styles' ); This was (is) a standard approach, but TT3 is unique in that it does not include a functions.php file, and therefore does not register this support.

I am concerned that this issue might extend beyond just the Image block, so we need to identify what changes were made in Gutenberg that are causing this regression.