Problem

When trying to preview a PDF attachment in Browser, some of the pages does not render and are showing blank. Downloading the PDF or having then embedded in the PDF Macro will show complete Content.

Steps to Reproduce

Download a PDF with many pages, and attach it to a Confluence page. (Used Confluence 6.2 Guide PDF)

Go to the attachments Page and try to preview the file

Expected Results

We Should be able to view all the pages without issue. Showing page 12 as it's the one not rendering.

Actual Results

The PDF does not render correctly and is blank in the preview

Workaround

Adding the PDF to a page inside a PDF Macro, will render it correcly

Notes

I have tested this with Several Browsers, so it seems something changed in newer versions?

Chrome 90/91 -> Works OK

Vival 4+ -> Works OK

Firefox 88+ -> Doesn't work, I didn't test 87 and previews

Chrome 92 -> Doesn't Work

Edge 91+ -> Doesn't Work, I couldn't test previous version

Safari 14+ -> Works OK