Issue Summary

When exporting a Confluence Cloud page containing a very long PlantUML-generated PNG image, the exported PDF includes a large blank space (sometimes a full blank page) immediately before the image. The image itself is split across two PDF pages due to its vertical length. This issue does not occur when viewing the page in Confluence—only in the PDF export. The problem is reproducible with PlantUML diagrams that generate tall images, and it significantly impacts the readability and professional appearance of exported documentation.

Steps to Reproduce

1. Create or open a Confluence Cloud page that contains a PlantUML image generating a very tall PNG image (for example, a complex flowchart or sequence diagram).
2. Click the ellipsis (…) menu at the top right of the page.
3. Select Export > Export to PDF.
4. Open the exported PDF and scroll to the section containing the PlantUML image.

Expected Results

The PDF export should display the PlantUML image immediately after the preceding content, with no excessive blank space or blank page. The image should be rendered as seamlessly as possible, even if it needs to be split across multiple PDF pages due to its length.

Actual Results

A large blank space or an entire blank page appears immediately before the PlantUML image in the exported PDF. The image is split across two PDF pages, and the rest of the content renders as expected.
This behavior is confusing for users and disrupts the flow of exported documentation, making it appear unprofessional.

Workaround

Currently, there is no known reliable workaround for this behavior.
Some users have reported that modifying the PlantUML diagram (such as reducing its vertical length or splitting it into smaller diagrams) may sometimes avoid the issue, but results are inconsistent.
A workaround will be added here when available.