Tried: components disabled, CSS regenerate, “Disable Bricks theme styles in the block editor” → no change (rule comes from Bricks default/frontend styles, not Theme Styles link selectors).
Related but different: Theme Styles injection threads (#40388, #40395). This is specifically the core :where(a) reset making content links unreadable in the editor.
Expected: visible link formatting in Gutenberg, as before 2.4.1.
Do you have “Disable Bricks theme styles in the block editor” toggled off? If I do that, it’s as you describe. I have it disabled because of another issue with paragraph spacing and contextual spacing. What I want is for Bricks to leave the styling alone and let the default WordPress styles work in Gutenberg.
Thanks for reporting the remaining link-formatting issue after the 2.4.2 update. Bricks 2.4.3 addresses this follow-up case: native Gutenberg links retain their visible color and underlines even when no Link Theme Styles are configured.
Bricks 2.4.3 is now available as a one-click update in your WordPress Dashboard.
Please read the changelog entry before updating, and let us know if you experience any issues.