2025-02-19, 11:45 PM
It was Private Internet Access, but it seems not to have been it.
I went into Chrome and removed a bunch of extensions that no longer worked and which Chrome was saying would be removed. One of them was FoxyProxy. After removing those and restarting Jellyfin it all worked.
Even though I couldn't see the setting anywhere, somewhere aspnetcore network configuration was somehow getting a setting from one of my Chrome plugins.
Pretty unlikely anyone else will have this problem, but if you do, here it is.
Thanks for the help @TheDreadPirate.
I went into Chrome and removed a bunch of extensions that no longer worked and which Chrome was saying would be removed. One of them was FoxyProxy. After removing those and restarting Jellyfin it all worked.
Even though I couldn't see the setting anywhere, somewhere aspnetcore network configuration was somehow getting a setting from one of my Chrome plugins.
Pretty unlikely anyone else will have this problem, but if you do, here it is.
Thanks for the help @TheDreadPirate.