Attachments are not listed in the new extradoc Attachment LT when on a hidden page

To reproduce:

• Go to http://localhost:8080/xwiki/bin/view/XWiki/DefaultSkin
• Add an attachment and refresh the page
• You'll see that the attachment tab correctly indicates it has 1 attachment
• Click the attachment tab and the attachment is not listed

Note that it works fine on other pages I've tested (wiki home page, sandbox, new page). Not sure what's special with XWiki.DefaultSkin.