I use old.lemmy.world as my interface and I've noticed that roughly every month I'm:
Forcibly logged out and have to do the re-auth dance for no apparent reason.
Everything I've set in Settings is forgotten: Default Listing reverts to All, Default Post Sort reverts to Hot, and so on.
My browser is set to retain cookies and such, so it's not PEBKAC/PICNIC. Why is Lemmy doing a nuke-from-low-orbit every month (roughly) despite me using it as recently as the day before? Why aren't my preferences being retained between logins?
Thanks for looking into that, and for the reply - this would explain a lot.
Coupled with mlmym issue 104, noting that those settings are always stored client-side in the cookie, it explains what I'm experiencing: https://github.com/rystaf/mlmym/issues/104