Attachment File Not Found - in children pages when a page is moved to another space

Problem Statement

Attachment file will not be migrated but remained in the original folder within the file system when a page (this includes the child pages) is moved between Confluence spaces. The attachment file may not be re-archived properly according to the new page and space hierarchy. As a result, a broken image will appear on Confluence page and the following errors will return upon selecting the attachment from the attachments list via "•••" > Attachments (#).

Steps To Reproduce

1. Create a new Confluence space. (Let's name it "Space A").
2. Create a new Confluence page in Space A. (Let's name it "Parent Page").
3. Create three child pages under Parent Page and insert 10 attachments into each pages.
4. Create a new Confluence space. (Let's name it "Space B").
5. Move the Parent Page from Space A to Space B.
6. Access the child pages and observe the results. Otherwise, you may access the attachments list via ••• > Attachments (#).

Alternatively, you may download and install the .jsp file here to determine the exact number of missing attachments via http://<baseURL>/admin/find_and_recover_attachments-3.1.x-v5.jsp .

Expected Behaviour

All attachments under the Parent Page should be moved from Space A to Space B respectively.

Actual Behaviour

Attachments are broken and cannot be found with the following errors thrown.