Kindle Oasis no longer displays catalogs as periodicals
I've started to have problems with the way my Kindle Oasis (2017, firmware 5.9.6.1) displays calibre catalogs. Until recently, when I generated a calibre catalog in .mobi format and sent it to my Kindle from Calibre, it was displayed as a periodical, with Author, Title etc sections. Now it's displayed as a personal document, with no table of contents at all, and there's no way to navigate it. To my knowledge nothing has changed in the way I generate the catalog. Nothing is stuck indexing on the Oasis. I have the latest Calibre 64-bit on a Windows 10 computer.
What is really weird, both my Voyage and my Oasis 2016 are on the same firmware and still display catalogs correctly.
Any thoughts, anyone?
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