Description

When clicking the Outline button variation, the proper styling is not being applied. This issue exists with TT4 on both front/back ends, but with my Powder theme, only on back end.

Step-by-step reproduction instructions

1. Go to a post or page and add the buttons block.
2. Create a button, apply Outline variation.
3. See bug.

Screenshots, screen recording, code snippet

Environment info

WordPress 6.6-beta1

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