Since at least yesterday, if I’ve tried to get fics from my email, and the update has been a new chapter, FFF has told me that they’ve been skipped because they’re duplicate stories. All fits have been AO3, and if I go directly to them and update ePub there has been a new chapter, so for instance I had five chapters on this
fic and it updated to six. I’ve updated to the latest version of the plug-in, still happened, and I’m on calibre 6.27