Update: The issue below has been resolved.
Today I tried to move a book listed in micro.blog bookshelves that I was currently reading to finished, but when I clicked “Move To Finished” the book was removed from the currently reading list and not added to finished. I do notice that the book title still appears in the rendered version of the reading list on my blog. I then tried to manually add the book to Finished and it doesn’t appear. I also tried re-adding to Current Reading and it is not adding their either. Something appears to fundamentally not be working for the moment. Reported to firstname.lastname@example.org.