Using page preview does not render Table of Contents macro

Issue Summary

When a page has the Table of Contents macro and we use the page preview mode, the macro is not rendered.

Environment

• Cloud
• Fabric Editor

Steps to Reproduce

1. Create a new page
2. Insert the Table of Contents macro
3. Insert some heading in the page
4. Make sure that the heading levels are correctly included in the macro settings
5. Enter preview mode

Expected Results

• Page preview renders the table of contents macro correctly

Actual Results

• The macro is not rendered at all

Notes

• This behaviour is not present in the legacy editor
• The Table of contents is rendered after publish
• The Table of contents placeholder (in edit mode) renders correctly

Workaround

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