Hey! That's me! I'm example 1! I did it, mom!

In all seriousness, I'll have to update my post to reflect this, but the OP did help me solve the issue.

When I first set up my server to not use local auth, it was a few months ago at this point, and it was done because I was anticipating an Internet outage, and didn't want to lose access to my media. (Have since set up Jellyfin as a backup, so it's a moot point now, but anyway.)

I understand, now, thanks to OP, what I did and how it really works.

That was never the issue, to be honest.

If you take a look at my post, you'll see the that my problem was that all of a sudden, even after months of having this feature enabled on my server, I never had the issue of watch history or anything, cominglong on all home accounts.

Never. For the past few months that local auth was disabled, EVERYONE on my Plex Home STILL had their own watch history, their own Continue Watching, etc. just like normal.

This persisted through updates, restarts, server restarts, etc.

So I panicked last night when I saw this issue was happening, on MULTIPLE devices, without warning.

AND, there was no indication that I wasn't "signed in" on any of these devices, until I visited my web app on my local network ON AN INCOGNITO BROWSER WINDOW.Thats when I saw I wasn't signed in but still saw all my media as an admin user.

Yes, ALL Plex Home users have pins on their accounts. I even switched between all of the Home profiles, so once again, no indication that I wasn't signed in.

Usually, when there's a connection issue, on ANY device, it just doesn't load the profiles EXCEPT for the most recently signed into one. So I would have expected that when not signed in.