Confluence attachment macro in footer crush the page preview

Problem

Per this documentation https://confluence.atlassian.com/doc/attachments-macro-97911315.html

This is useful when you want to add a macro outside the editor, for example as custom content in the sidebar, header or footer of a space.

Environment

Confluence Server & DC

Steps to Reproduce

1. Navigate to Space admin tool > Look and Feel > Sidebar, header and footer
2. Add the below code into Footer section

   {attachments:upload=false|preview=false}
   

3. Save the change
4. Go back to any page in this space
5. Click Edit > ... > Preview

Expected Results

A preview should be displayed as expected

Actual Results

Preview area stick on the left side of the page

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available