> Okay, thanks for the info - glad to know that it isn't just me! In the end, I > decided to edit the issues manually with the Calibre Editor so that I could > hit "Publish" at Amazon KDP today. But I'll make sure to test my build more > regularly in the future - there is always a next book, after all. ;)
Ah, that's another possibility. Anyway, I found some issues in the tocdepth warning thanks to your post, which didn't cause issues in your use case, but would produce a wrong result in \tableofcontents. I also got another bug report for TeX4ebook, so maybe I will make a new release before TL 2021 is frozen. Best regards, Michal