i meet the same problem.

system.net.log:

System.Net.Sockets Verbose: 0 : [1908] DNS::GetHostEntry(10.11.1.60)
System.Net.Sockets Verbose: 0 : [1908] Exiting DNS::GetHostEntry() -> IPHostEntry#34948909
System.Net.Sockets Verbose: 0 : [1908] Socket#46104728::Socket(InterNetwork#2)
System.Net ...