you're almost certainly routing local network traffic over NetBird instead of using local routes
That's precisely the functionality I want, though. Secure, encrypted, mutually identified traffic should be the only traffic in a zero trust network.
I'm simply trying to create an ingress point into this network for outside access.
Well the internet down scenario has only happened once, and I returned home to no internet, booted up my laptop, and could not connect to any of my services since I couldn't reach my control server. I haven't forced the issue to occur by disconnecting my internet and testing connectivity. I just did the lazy thing and connected to the services I wanted via their IPv4 address