Description

Two days ago (May 8, 2024), the Gutenberg plugin updated from 18.2.0 to 18.3.0 and it no longer finds my custom color palette or typography changes. The site seems to display properly but the editor only shows the default colors and fonts.

Step-by-step reproduction instructions

I'm not sure what to say here. I started editing today a new post and the fonts were wrong, and with the wrong color. I then noticed that my color palette had disappeared from the Site Editor, along with other options.

Looking at the blog itself shows the correct fonts, but even when trying to edit older posts that appear properly in the blog cannot be done in a true WYSISWG fashion, the fonts and other things use the default colors of the theme, for instance.

Disabling the plugin "fixed" the problem, but the default Gutenber editor available in 6.5.3 has many problems, especially in mobile devices. I don't know how to revert to 18.2.0 but I know it was working a few days ago.

Screenshots, screen recording, code snippet

Environment info

WordPress 6.5.3
Theme "Twenty twenty-three"
Guttenberg 18.3.0 shows the problem, it disappears when deactivated.

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

Yes

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

No