Host & OnServerConnect

When i start host it calls OnServerConnect twice. difference is conn.address; localClient and localServer. what is the idea of this? i expect OnServerConnect for each client connect.

After Start Host
OnServerConnect :: localClient :: 0 :: hostId: -1 connectionId: 0 isReady: False channel count: 0
OnServerConnect :: localServer :: 0 :: hostId: -1 connectionId: 0 isReady: False channel count: 0

After Remote Client Connect
OnServerConnect :: ::ffff:127.0.0.1 :: 1 :: hostId: 0 connectionId: 1...

Host & OnServerConnect