the actual problem here is that OPs network is not configured correctly and that Plex detects that the physical local client is actually accessing the server from a totally other network.
Fairly common when you use docker to run Plex and have the container run in bridge mode. This will put the container in the docker network that will then be different to your local network.
Plex determines if a stream is local or remote based on the network so when your container is in bridge mode, the physical local client will be a remote connection because of the different networks.
And since remote streaming requires Plex pass since end of April, you will see this.
I looked a bit in the names of the Studio, Director and Writer to see what they previously did and what sort of scores those things got on MAL.
Looks like a pretty good score spread over those with only “Shisha no Teikoku” getting a below 7 rating, the rest everything above or close to 8. With Shuhei Handa in the Position of which we got “Dungeon Meshi” and “One Punch Man”, this looks really promising