@Atomatth for what its worth, I’ve noticed a similar problem when accessing the local embedded client. For me, if I try and access 192.168.1.3:32400/web/index.html WITHOUT signing in, my plex content never shows. If I sign in then it does.
I have Secure connections set to Preferred and List of IP addresses and networks that are allowed without auth set to 192.168.1.1/24 so local access on my network does not require login.
Up until Version 1.40.0.7998 with client Version 4.123.2 was rolled out this was not a problem.
I also downgraded my server to Version 1.40.0.7997 with client Version 4.118.0 and this problem does not happen.
I’m also on ubuntu linux (physical hardware).
Is plex now forcing clients login ?