This is happening with multiple translated articles that have already been saved and published, but we get a 404 on them because the slug is being removed from the editor.
Steps to reproduce the issue:
  • Go to a translated article that's missing the slug
  • Add the slug
  • Manually save draft or publish the article, it'll say it was successful
  • Access the published article, you'll see a 404
  • Refresh the editor page, you'll be taken to the dashboard as if the article no longer exists
  • Go back to the article in the editor, you'll see the slug is missing