Bug on useRootPaddingAwareAlignments mode when using core/columns block with alignfull

[daviedR]

Description

When useRootPaddingAwareAlignments mode is enabled (on theme.json), root left and right padding will be added to core/group blocks with a constrained layout, and any nested full-width (alignfull) blocks will stretch outside of the parent group itself.

The children of the alignfull blocks will also get additional left and right padding to compensate for the negative margin given to the alignfull parent block.

However, this causes issues if the alignfull block is a core/columns block. The core/column blocks inside will automatically get additional left and right padding.

This issue also happens on core/group block with row mode (horizontal flex).

This issue doesn't happen in the Block Editor preview, only on the frontend side.

Step-by-step reproduction instructions

1. Test using a fresh installation of WordPress 6.2.2 and use the default TwentyTwentyThree theme.
2. Create a new page and insert this block snippet:

<!-- wp:columns {"align":"full","backgroundColor":"cyan-bluish-gray"} -->
<div class="wp-block-columns alignfull has-cyan-bluish-gray-background-color has-background"><!-- wp:column {"width":"50%"} -->
<div class="wp-block-column" style="flex-basis:50%"><!-- wp:paragraph {"backgroundColor":"luminous-vivid-amber"} -->
<p class="has-luminous-vivid-amber-background-color has-background">Paragraph on The Left Column</p>
<!-- /wp:paragraph --></div>
<!-- /wp:column -->

<!-- wp:column {"width":"50%"} -->
<div class="wp-block-column" style="flex-basis:50%"><!-- wp:paragraph {"backgroundColor":"light-green-cyan"} -->
<p class="has-light-green-cyan-background-color has-background">Paragraph on The Right Column</p>
<!-- /wp:paragraph --></div>
<!-- /wp:column --></div>
<!-- /wp:columns -->

3. Publish or save, and then view the page on the frontend side.

Screenshots, screen recording, code snippet

Environment info

• WordPress 6.2.2
• TwentyTwentyThree theme
• Gutenberg 15.8.1 (bug occurs with or without Gutenberg plugin)

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