I think every user lost their lists in January. Apparently, only the reads you rated stays in your list and the ones you didn't got removed. Though, some of my now reading got moved into the already read list so you should probably check yours too
Are u logging after a long time? cuz the site went down for a while arnd feb and everyone lost their reading list sadly for some it came back and for some it didn't
I JUST NOTICED MY ENTIRE READING LOST HAS DISAPPEARED. I had like 200 already read stories, and 150 want to read lists and all has disappeared.