Just looked at the Swarm Log, this is what I get
11:02:51: [Interface:TryOpenConnection] Local connection established
11:02:51: [Interface:OpenJob] Error: Value cannot be null.
Parameter name: value
11:02:51: [MaintainConnections] Detected dropped local connection, cleaning up (643BF1C2)
11:02:51: [CloseConnection] Closing connection 643BF1C2 using handle 643BF1C2
11:02:51: [CloseConnection] Connection confirmed for disconnection 643BF1C2
11:02:51: [CloseConnection] Closing orphaned Job ()
11:02:51: [CloseConnection] Connection disconnected 643BF1C2
11:02:51: [GetMessage] Safely returning to 643BF1C2 with no message
11:02:52: [MaintainConnections] Local connection has closed (643BF1C2)
11:02:52: [MaintainConnections] Removed connection 643BF1C2
11:02:52: [MaintainConnections] All connections have closed