I noticed a few days ago I was logged out of my account here and when I logged back in, all the series I had saved under my Reading lists etc., got cleared out.

It looks like my message inbox was cleared too.

Any idea why that happened?

We don't delete your data, so there's a good chance someone else logged into your account and just deleted stuff. You may wanna reset your password too

A just ruler amongst tyrants

Wonderful... I'll do that. Thanks.