Important-ish?

Hey!! Posting this in a popular story just to see if it's been happening to other people as well. I noticed that all of the stories I had in "want to read" and "currently reading" have disappeared along with the comments I placed in each stories, I had to put them again on my list but I don't even remember most of them as I have read over hundreds now. I'm just wondering if it also happened to other people.. I'm worried with what it means for the future of the mangago site, is this just a glitch or bug?