LinkedIn caches link preview content for 7 days. This means that after updating a published job's content (title, description, etc), sharing your website link will still display old preview content and image until the next time they cache.
To rectify, you can attempt to have LinkedIn 're-inspect' your post. Here are the steps:
Navigate to the newly updated job in your job portal
Ensure updates are correct (title is updated)
Copy job URL
Navigate to this website HERE
Paste the job URL in
You should see the updated preview image.
If you are still experiencing issues, please reach out to us at firstname.lastname@example.org for further assistance!