Definitely complicated to root cause. Please share if ya figure out the hard parts 😄

An idea: Netflix could be fingerprinting TUN interfaces on the TV.

One thing I’d consider trying is Tailscale in userspace networking mode on a distinct network host at location 2, which’ll start a SOCKS/HTTP proxy that the TV can use for outbound connections.

Bonus: any devices incompatible with Tailscale can use the proxies.

If you’d like to take a stab at this, Headscale is a self-hosted version of Tailscale’s service. Personally, I use Caddy to automatically manage letsencrypt certs while proxying requests to Headscale.