This is the first thing I’d look at too.
Comment on Reducing buffering when accessing Jellyfin via Tailscale
Funky_Beak@lemmy.sdf.org 1 week ago
Tailscale can use relays if it cant find a way to make a p2p connection. Check the documentation. There is a command you can run to see whats using the relay.
jonathan@piefed.social 1 week ago
NightmareQueenJune@lemmy.world 1 week ago
The siblings could run
tailscale ping nodeIP/nodeNameThis not only shows if they are connected via a DERP (relay) but also retries to connect them directly a few times.
If that doesn’t work out it can sadly be quite hard figuring out why a DERP is used instead of a direct connection.