FSE Navigation block: Menu item for "Posts page" is missing required class if added as static page

[them-es]

Description

If a posts page has been added as a static page (see instructions/screenshot below) the respective menu item should include required menu classnames like current-menu-item.

Step-by-step reproduction instructions

1. Open Settings > Reading and select "Your homepage displays a static page"
2. Select a "Homepage" (e.g. Home) and a "Posts page" (e.g. News)
3. Install a FSE Theme (e.g. TwentyTwentyTwo)
4. Edit site and add a new navigation with the custom links "Home" and "News"
5. Open the frontend and access "News".
6. The menu item class is missing current-menu-item (Home works as expected!)

Screenshots, screen recording, code snippet

News: Missing "current-menu-item" class

Home: Ok

Environment info

• WordPress 5.8.2 (+ Gutenberg 12.2.0) OR WordPress 5.9 (RC 1)
• TwentyTwentyTwo Theme
• Chrome/Firefox (latest versions)

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

[them-es]

Closing as it seems to be fixed by #51478 (See #34770)