Folders switching to default

A new issue which only recently started is that all of my movie folders will switch back from the ‘library’ setting that I put them all on to the ‘recommended’ setting. Does anyone know why this is happening? It never used to forget the setting that I put them on but it routinely does this now so I have to keep resetting it and its getting bothersome to keep doing this every time I use my Plex.
Thanks for any advise

Which client type are you using?
If it’s the web app, don’t forget to tell your web browser to NOT delete the cookies from plex.tv when it is closed.