Socket.ReceiveFromAsync result with endpoint 0.0.0.0:0 (Unity 5.3.1f1 Personal)

I am importing a code that uses SocketAsyncEventArgs into my project, using UDP. The socket is of datagram type

Sending a message with an SendToAsync call seems to be working properly, however, ReceiveFromAsync "returns" with the endpoint in the "receival" SocketAsyncEventArgs as the address 0.0.0.0:0.

I am using a "server" socket and a "client" socket for testing, running one on Unity...

Socket.ReceiveFromAsync result with endpoint 0.0.0.0:0 (Unity 5.3.1f1 Personal)