Issue Summary

When exporting a Confluence page containing a draw.io diagram specifically using the "Embed draw.io diagram" macro that embeds from Gdrive, the resulting PDF export does not include the diagram.

Steps to Reproduce

1. Create or open a Confluence page.
2. Add a draw.io diagram using the "Embed draw.io diagram" macro.
3. Select Google drive from the draw.io window and select the diagram to insert.
4. Publish the page and verify the diagram is visible on the page.
5. Go to ... (More actions) > Export to PDF.
6. Open the generated PDF and check for the diagram.

Expected Results

The PDF export should contain a static rendering of the draw.io diagram.

Actual Results

The diagram is missing entirely from the document.

Workaround

Add the diagram directly on the page and then export the page.