Not sure when and why it happened but couple of folders inside default My Library (which synced via seafile client) are standalone now.
For i.e. I have now two versions of books folder inside “My Library”.
Version “A” which directly inside desktop client or web app using cloud file browser and navigating My Library → books
Version “B” - navigate via desktop client, using cloud file browser My Library → books, then sync folder books and then click again in desktop client on books “library” and then browse using cloud file browser
There are two different versions of books folder with different bunch of files, while Version “B” I can’t find as library even in admin panel (so as far as I understand in normal situation synced folder just a link to folder inside library)