Inline style "min-width: 1px" breaks layout in the editor when using large font sizes in group blocks.

[Azragh]

Description

When I group two paragraphs with an inner padding (whether it is a fixed value or a variable from the new spacing presets), the inline style min-width: 1px; is applied to both. The problem with this is when I try to display a large letter with font-size: 5em; on the left and a full paragraph on the right, the paragraph with the large letter doesn't take up all its space / stretches awkwardly (see screenshots).

When I comment out the min-width, it works as expected.

Step-by-step reproduction instructions

1. add some spacing presets
2. add 2 paragraphs, one with one big letter (like 5em or sth), and another one with default font size
3. add a padding from the presets to both
4. group the paragraphs (don't allow wrapping on mobile)
5. notice the difference in the editor and frontend

Screenshots, screen recording, code snippet

Editor:

Frontend:

The one Line of CSS to remove to fix the preview (applied inline to the paragraphs):

After commenting out:

Environment info

Gutenberg v14.3.1
WordPress v6.0.3

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

[Mustafabharmal]

I've identified that the inline min-width: 1px style is being applied by the useDefaultStyle hook in the rich-text component. This was originally added in 2021 to prevent rich text containers from collapsing to 0 width and hiding the caret , but it's causing layout issues in flex containers (group blocks) when using large font sizes.

After research, I found that:

• The codebase already uses ZWNBSP (zero-width non-breaking space) as the primary mechanism for caret visibility in empty elements
• Modern browsers handle caret visibility much better than in 2021
• No existing functionality depends on the minWidth style

I'll submit a PR to remove this style, keeping only the essential white-space: pre-wrap for proper WYSIWYG editing.

Related PR's
#30190
#30224

Related Commits:
b690b8f
f7f6643