This is because the auth server is getting ddos attacks recently. With these attacks the server needs to filter out this shit, so it has less processing power for the connections for all the bots. We can only wait till bossland shifts the server to another spot or de ddos attacks stop.
today still auth disconnect 80% buddywing closed alone. really this is boring. you need 50 Euros per month for a dedicated server? It's not a problem. but who has many bot is really boring when you disconnect all for this orrible auth