Is my account being reboot or smth?

Why did my bookmarks disappear?? The list I have in want to read, already read, reading. All disappear even when I reopen my account what's going on?? I try to rebui them but the mangas and the masterpieces I had read or planning to read disappear and me and my forgetful ahh don't remember the titles whyyy ??? Is there a method I can reclaim them? I remember it's almost 400+ reading and 100+ already read and 50+ want to read last I checked before all of them disappear. Now I have no choice but to literally rebuild them all UGHH why is that??? ┗( T﹏T )┛