I have personally received responses from leafo on this forum before and I know he does read and respond to messages here. I don't expect a response to the actual problem, partly because this isn't a formal support channel but mostly because I'm not the developer in question, I'm just someone who bought the book and can't claim it.
It's frustrating that the issue hasn't been resolved, but the real reason to post here is to highlight what might be a broader issue: from personal discussions with other creators it seems like this is not an isolated incident. It's possible that this is a UI issue, but equally it might be some kind of deeper backend problem, and either way it's worth bringing to itch's attention in a place that does periodically get some acknowledgement.