The "good" Windows firewalls like Outpost and Zone Alarm used to have features to catch this, they'd detect when a process tried to invoke or open a running process which had internet access. They'd also do things like detect when a process tried to write a startup item. This went by names like "Leak Control" but it was basically providing near-complete HIDS features with local control.

That could have benefits, for example, if you're concerned about a DDoS attack on that service taking your home internet out, you may be able to work around it like this. But it won't mitigate a gaping hole in the underlying service which you're still exposing.

It could also have drawbacks, like limited bandwidth and higher latency, which would make it highly unsuitable for something like a game server.

is probably pretty safe.

Plex still seems slicker than Jellyfin in some ways but after that experience I'd certainly consider a switch. Offline is the only reason I still use plex, but their offline setup is pretty buggy too.

Once people realize how the display randomly leaves old junk on the screen and requires a manual refresh to fix and the software is a barely modified from stock AOSP let alone has sufficient modifications to make use with this screen possible, this will be right behind the Rabbit R1 and that stupid AI pin as worst product of the year.

You paid for that service, they should be able to provide it to you. If it negatively impacts other users, that's the provider's fault.