To reproduce:
1. Open attached project "New Unity Project.zip"
2. Build for standalone
3. Open two instances of the build (I was not able to connect using two machines)
4. On one instance press Start Server
5. On another instance press Start Client
6. In Server client type "Testing" and press Update Payload
7. Focus Client instance and observe that address: line appears in the top
8. On the Server instance delete a couple of letter to e.g. "Test"
9. Focus Client instance and notice that the address is not updated
10. Open mac console (command + space > console) and observe the Player.log

Expected result: the address on the Client instance is updated
Actual result: the address is not updated and getting in the console:

Couldn't parse broadcast: {"Name":"Test","Revision":3}:2}

(Filename: ./Runtime/Export/Debug.bindings.h Line: 43)

Reproduced on:
2017.2.3p3 2017.4.8f1 2018.1.9f1 2018.2.2f1

Gettings errors in 2018.3.0a7:
NullReferenceException: topology is not defined
UnityEngine.Networking.NetworkTransport.AddHostWithSimulator (UnityEngine.Networking.HostTopology topology, System.Int32 minTimeout, System.Int32 maxTimeout, System.Int32 port, System.String ip) (at /Users/builduser/buildslave/unity/build/Runtime/Networking/ScriptBindings/UNETworking.bindings.cs:73)
UnityEngine.Networking.NetworkTransport.AddHost (UnityEngine.Networking.HostTopology topology, System.Int32 port, System.String ip) (at /Users/builduser/buildslave/unity/build/Runtime/Networking/ScriptBindings/UNETworking.bindings.cs:90)
UnityEngine.Networking.NetworkTransport.AddHost (UnityEngine.Networking.HostTopology topology, System.Int32 port) (at /Users/builduser/buildslave/unity/build/Runtime/Networking/ScriptBindings/UNETworking.bindings.cs:95)
UnityEngine.Networking.NetworkDiscovery.StartAsServer () (at /Users/builduser/buildslave/unity/build/Extensions/Networking/Runtime/NetworkDiscovery.cs:250)
Tengio.NetResourceServer.Update () (at Assets/Scripts/NetResourceServer.cs:55)