[Steinway]

Thank you! I really appreciate all the work you're putting into this, and I'm confident that you'll find a solution eventually!

By the way, wouldn't a page in the process of rendering always be shown as a blank page with a spinning circle, even if it were stuck in an endless loop somehow, and never actually would finish the rendering? I have (extremely rarely) had a page with an eternal spinning circle, which didn't render until I turned a few pages back and then tried again. With my dreaded black pages, however, there's no spinning circle or any indication at all that it is in the process of rendering (or trying to, and failing). There's simply an instant black page, as if it never even tried to load the page.. 

Note though: If there are any annotations on the failed page, however, they are actually displayed correctly (on the blackness).