Description

"Show Template" restricts user from editing post title if title is stored in a template part.

Step-by-step reproduction instructions

1. In the site editor:

2. create a template part - Masthead

3. insert core/post-title

4. save

5. In the site editor:

6. create a template - Fancy Page

7. insert template-part Masthead

8. save

9. Create a New page

10. in the page editor:

11. click 'Template' link and enable "Show Template"

12. Select 'Fancy Page' as the page template.

Note:

1. User can not set or change the Page/Post title.
2. The User can edit the template-part 'masthead`; however this will not allow the to set or update the title.
3. Quick-edit appears to be the only mechanism available to edit the page title
4. [Update] the page title can be udated via the Verticle Ellipsis in the Post / Page Sidebar

possibly related to: #67621

Screenshots, screen recording, code snippet

Environment info

Theme TT25
WordPress Version 6.8.2

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

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure