I have checked the database following your advice and the cover id in the database is not in the folder .kobo.images.
In the backup I have from a time the book was OK, the cover id is different and it is in the folder .kobo.images.
In the actual database it is the cover id that was pointed in the old database
Therefore, in the moment the book is not longer available in the kobo store, something is changed in the database after a sync, and the cover disappears (but the question is: why it reappears briefly after a sync?.
Is it relevant the subfolder where the cover file is?. I have not found any reference to them (e.g .kobo.images/250/4).
Last edited by JIPG-reader; 07-27-2019 at 05:08 PM.
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