Crashing the server

Since yesterday's wipe, one of my server's been crashing and after troubleshooting, I've noticed a trend. I've checked 6 of the logs and every one is crashing after this plugin announces a save.

[Automatic Countdown Save] Waiting for the next server save...
Saved 56,300 ents, cache(0.25), write(0.05), disk(0.01).
Saving complete
[Automatic Countdown Save] Server save countdown started! Saving in 590 seconds.
SocketException: The socket has been shut down
  at System.Net.Sockets.Socket.EndSend (System.IAsyncResult asyncResult) [0x00012] in <16dfb5860e254abfaf53d35b68159aef>:0 
  at System.Net.Sockets.NetworkStream.EndWrite (System.IAsyncResult asyncResult) [0x0002a] in <16dfb5860e254abfaf53d35b68159aef>:0 
Rethrow as IOException: Unable to write data to the transport connection: The socket has been shut down.
  at System.Net.Sockets.NetworkStream.EndWrite (System.IAsyncResult asyncResult) [0x0006e] in <16dfb5860e254abfaf53d35b68159aef>:0 
  at Fleck.WebSocketConnection.OnSendComplete (System.IAsyncResult result) [0x0005a] in <09b2e2afed8c4cd2bf75c3f38e4fc051>:0 
UnityEngine.DebugLogHandler:Internal_LogException_Injected(Exception, IntPtr)
UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
UnityEngine.Logger:LogException(Exception, Object)
UnityEngine.Debug:LogException(Exception)
Facepunch.Rcon.<>c__DisplayClass27_1:<Start>b__4(Exception)
Fleck.WebSocketConnection:HandleWriteError(Exception)
Fleck.WebSocketConnection:OnSendComplete(IAsyncResult)
System.Net.Sockets.<>c:<Complete>b__27_0(Object)
System.Threading.QueueUserWorkItemCallback:System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
System.Threading.ThreadPoolWorkQueue:Dispatch()
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback()

This spams my console and then the server restarts.