Logspam after disconnecting a client

[cBournhonesque]

After running

    mut servers: ResMut<ServerConnections>,
// ...
    let _ = servers.disconnect(*client_id);

we get spammed with logs

2024-08-30T20:53:28.729407Z ERROR send_packets: lightyear::server::networking: Error sending packets: netcode error: tried to send a packet to a client that doesn't exist

Are they really disconnected? Why is there a logspam? Add a unit test