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https://www.mangago.me/home/mangatopic/21080691/
Mine are also all gone, I'm here cos I'm curious if somebody knows why this happened. It is strange thet I didn't had any updates for my "reading list" for the last week 9t may be two weeks, Yesterday I checked some of them manually, and found new chapters (but no notification of that), and the lists were alright, and today they're GONE ( ＞Д＜；)
Read the link suujin posted above, it explains everything
om gonna flip actually my want to read and reading and already read lists of the past 7 years are gone
anyone knows a solution to this problem cus now i hate it here it's making me so sad