SQL Server Reporting Services generation issue with 4.9.0

**Describe the bug**
I have NET Core application. It generates some reports using SQL Server Reporting Services (ReportExecutionServiceSoapClient and ReportingService2010SoapClient). Things worked OK till we upgraded to 4.9.0.

Previous version 4.8.1 works OK.

Now it gives the following error:
```
System.ServiceModel.Security.MessageSecurityException: The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'NTLM'.
at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.<>c__DisplayClass1_0.b__0(IAsyncResult asyncResult)
--- End of stack trace from previous location ---
```

**To Reproduce**
It fails on any SSRS call like
```C#
RS.TrustedUserHeader? trustHandler = null;
var response = await rsService!.GetItemParametersAsync(trustHandler, "NAME", null, false, null, null).ConfigureAwait(false);
```

**Expected behavior**
A report to be generated