Link fixing does not fix URL thumbnails

Issue Summary

After migrating from Confluence Server/DC to Cloud, links of format "https://confluence.company.com/download/thumbnails" refer to the existing server instance.

Scenario

• Confluence Server/DC -> Confluence Cloud migration
• Confluence space export (either Server or Cloud) and Confluence space import

Affects products

• Confluence

Steps to Reproduce

Confluence server

1. Create a Confluence page
2. For the contents on the page, ensure there is a link which refers to a thumbnail. In the storage format, the content will be:

   https://confluence.company.com/download/thumbnails/15142949/IMG_4592.JPG?version=1&modificationDate=1534213323119&api=v2
   

3. Migrate content to Confluence Cloud

Expected Results

Links are updated after migration to redirect to the appropriate/corresponding Confluence Cloud page URL

Actual Results

Outgoing links still refer to Confluence Server

Workaround

Contact Atlassian cloud migration support