Attachments don't appear in the picker of the Office Document Viewer macro

Steps to reproduce:

1. Attach a document to a page (word/powerpoint/excel)
2. Click on Insert > Other Macros
3. Search for Office Document Viewer macro
4. Click Select
5. Select the document from the drop down list under Reference
6. Click Submit

Expected results: The document is shown in the page.

Actual results: No document appears in the drop-down list. This issue is currently affecting the Cloud instance 11.10.5 and also on 11.10.4 (Intranet Staging) https://jira.xwiki.org/browse/XWIKI-17781?focusedCommentId=106843&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-106843

Working in XWiki 11.10.10