Summary from https://support.atlassian.com/browse/JST-104095

• Macros don't render because the body can't be found using the macro body hash.
• Is not a preview issue (there is an issue there, too, but that's a known issue)
• Sounds similar to CONF-33830, but Matt Jensen ruled that out
• Is reproducible here: https://theplatform.jira.com/wiki/display/~ben.johnson/Numbered+Headings+2