RDP .NET Desktop session unable to send proxy ping request to localhost:9000

I'm using the Refinitiv.Data library for .NET and am trying to open a Desktop session to connect to an instance of Workspace.

Refinitiv.Data.Log.Level = NLog.LogLevel.Debug
session = DesktopSession.Definition().AppKey(appKey).GetSession(); 
session.Open();

When running the above code when setting up the project as a Console Application, I am able to connect, but when setting this up as a class library and calling the code from a Windows Application, the session.Open call is hanging on the ping request and blocks the rest of the application. Can I find any log files for Workspace to see why the request might be hanging?

The RDP logs when running as a Console Application:

2021-05-26 17:32:16.8271|Info|Refinitiv.Data.Core.DesktopSessionCore|10|Using default port: 9000
2021-05-26 17:32:16.8591|Debug|Refinitiv.Data.Core.DesktopSessionCore|10|Sending desktop proxy ping request (GET): "http://localhost:9000/ping?all"
2021-05-26 17:32:18.0684|Debug|Refinitiv.Data.Core.DesktopSessionCore|14|Desktop Session proxy ping succeeded: {
    IsSuccess: True
    HttpStatus: {
  "HTTPStatusCode": 200,
  "HTTPReason": "OK"
}...

The RDP logs when built as a class library:

2021-05-26 18:14:32.7178|Info|Refinitiv.Data.Core.DesktopSessionCore|1|Using default port: 9000
2021-05-26 18:14:32.7548|Debug|Refinitiv.Data.Core.DesktopSessionCore|1|Sending desktop proxy ping request (GET): "http://localhost:9000/ping?all"