I have been working on a 200 page PDF for about 3 years now. Every couple weeks or so the client has an update and a new version is created for the website's download page. There are technically three designs in: English, Japanese and Simplified Chinese.
Today, when exporting the English PDF and the Japanese PDF, there was one page where the contents failed to export (blank). What is strange is that this was a page that did not receive any edits and had been exported many times before without fail.
I wondered if perhaps the data was corrupted, but both the Japanese design and the English design had an identical error. Both failed to export that one page. When I re-opened both design files, everything looked perfect. When I re-exported, everything in the PDF, including that one page, exported fine without issue.
My boss wants to know what happened, but for the life of me I can't even begin to think of a way to troubleshoot it. I have been working on these same files and creating PDFs the same way for 3 years and this has never happened before.