Inserting Markdown on Markup Macro does not work

Issue Summary

The markdown content is not rendered when inserted on the Markup macro and selecting the "Markdown" syntax.

Environment

• Old editor

Steps to Reproduce

1. Create a page
2. Insert a Markup Macro
3. Choose Markdown on the syntax selector
4. Paste the Markdown text
5. Publish the page

Expected Results

The page would render the content properly

Actual Results

The raw Markdown text is inserted.

Workaround

• None