WebSocket Dial Handshake 403 When Connecting to Server Written Using x/net/websocket

We have a simplistic example websocket server written using this boilerplate in the labstack echo cookbook: https://echo.labstack.com/docs/cookbook/websocket#server

It's currently using `x/net/websocket`. On the client side that connects to this example server, I tried to swap out our `x/net/websocket` implementation for `nhooyr/websocket`, but when `websocket.Dial` is called, the handshake fails with this 403 error. I'm not sure why this is, as the default CORS for `echo` is to allow everything and if I swap back to the dialer in `x/net/websocket`, it works fine. Just in case, I've tried to provide a custom HTTP client with a custom transport that sets `InsecureSkipVerify: true` via the `DialOptions`, but this also did not work.