Styles missing with custom fields panel active

[gyurmey2]

Description

The nighly version causes a regression to the state described in issue #61565

Step-by-step reproduction instructions

1. Edit a page/post
2. From the preferences panel enable the custom fields and save

Screenshots, screen recording, code snippet

No response

Environment info

WP: 6.5.3
Theme: TT4
Gutenberg: 18.6.-nightly (18.6.20240528)

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

[Mamaduka]

cc @andrewserong, @tellthemachines

[andrewserong]

Thanks for the ping! Looks like it was to do with the recent change to the global styles rules. Fix here: #62121