TUI reports Network: Connected when etcdctl member list fails

[noonio]

Context & versions

In present master, you can find yourself in a situation where the TUI reports Network: Connected and yet you are in the minority on your etcd cluster; verified by etcdctl failing with:

{ "level":"warn"
  ,"ts":"2025-03-07T10:05:50.491189Z"
  ,"logger":"etcd-client"
  ,"caller":"[email protected]/retry_interceptor.go:62"
  ,"msg":"retrying of unary invoker failed"
  ,"target":"etcd-endpoints://0xc000426000/127.0.0.1:2379"
  ,"attempt":0
  ,"error":"rpc error: code = DeadlineExceeded desc = latest balancer error: last connection error: connection error: desc = \"transport: Error while dialing: dial tcp 127.0.0.1:2379: connect: connection refused\""
}
Error: context deadline exceeded

Most likely the node is not correctly emitting NetworkDisconnected messages.