Description

If you add the Table of Contents block to a new page, when you publish the page, the links don't work properly and instead open a new page with a Page not found error. The URL is retaining an auto-draft in it. If you edit and Update the page, the links will then work properly. Alternatively, if you publish the page first, then add the Table of Contents block, they will work correctly.

Step-by-step reproduction instructions

Create a new page
Add content, with headings, and the Table of Content block
Publish the page
View the page
Try the TOC links
Return to the editor and make a change
Update the published page
View the page
The TOC links now work

Screenshots, screen recording, code snippet

Environment info

WordPress version 6.0.1
Gutenberg 13.9.0

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