Issue Summary

After a Confluence Cloud-to-Cloud (C2C) migration using Data Transfer, embedded images within the Carousel macro fail to render in the destination site, displaying an "Image failed to load" error. While the migration plan reports 100% success and the attachment files are successfully migrated and attached to the destination pages, the references within the Carousel macro are broken or stripped during the import process.

Steps to Reproduce

1. Create a Confluence page with a Carousel macro containing embedded images (attachments).

1. Perform a C2C Data Transfer migration of the space containing that page.

1. Observe the Carousel macro on the destination page.

Expected Results

The Carousel macro should render the migrated images using the new destination attachment IDs.

Actual Results

The images fail to load, and the image-src parameter is missing from the page's storage format.

Workaround

Currently, the only workaround is to manually edit the affected pages and re-upload/re-select the images within the Carousel macro. Re-publishing the page without changes does not resolve the issue.