Deserialization issue when consuming ASMX Web Service from Xamarin Android .NET6 App - web-services

Question

Android application type: Android for .NET (net6.0-android)
Affected platform version: VS 2022 Version 17.3.0 Preview 5.0 (64 bit)
I'm upgrading an existing Xamarin Traditional (Android) application into .NET 6 but I'm running into deserialization problems. Our Android app integrates with a .NET Framework 4.8 ASMX Web Service on the backend. This has been working fine for years but doesn't work after we move to .NET 6.
I was able to create a repro project on my GitHub: https://github.com/adolfo1981/Net6AndroidWebServiceTest
Here are the details from deserialization error.
Exception:
The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter http://tempuri.org/:HelloWorldResponse. The InnerException message was 'There was an error deserializing the object of type ServiceReference1.HelloWorldResponseBody. Unexpected end of file. Following elements are not closed: HelloWorldResult, HelloWorldResponse, Body, Envelope. Line 1, position 298.'. Please see InnerException for more details.
StackTrace:
at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver)
at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName)
at System.Runtime.Serialization.DataContractSerializer.ReadObject(XmlDictionaryReader reader, Boolean verifyObjectName)
at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.PartInfo.ReadObject(XmlDictionaryReader reader, XmlObjectSerializer serializer) in /_/src/System.Private.ServiceModel/src/System/ServiceModel/Dispatcher/DataContractSerializerOperationFormatter.cs:line 657
at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.PartInfo.ReadObject(XmlDictionaryReader reader) in /_/src/System.Private.ServiceModel/src/System/ServiceModel/Dispatcher/DataContractSerializerOperationFormatter.cs:line 652
at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeParameterPart(XmlDictionaryReader reader, PartInfo part, Boolean isRequest) in /_/src/System.Private.ServiceModel/src/System/ServiceModel/Dispatcher/DataContractSerializerOperationFormatter.cs:line 521
My GitHub repro repo consists of the following projects:
HelloAndroid (NET6 - .net6.0-android Target Framework Moniker)
WebServiceServer (.NET Framework 4.8)
WebServiceClient (.NET 6) --> referenced by HelloAndroid project to consume ASMX Web
Services
ClientTestConsole (NET6 Console app) - to prove that Web Service works fine directly from console app (but fails from Xamarin Android)
Steps to Reproduce
Create a Xamarin Android (NET 6) project similar to #jamesmontemagno https://github.com/jamesmontemagno/net6-mobile-samples/tree/main/HelloAndroid
Create a .NET Framework 4.8 WebServiceServer application following instructions like this: https://www.c-sharpcorner.com/article/how-to-create-a-web-service-project-in-net-using-visual-studio/
Create a .NET 6 (Class Library) WebServiceClient and add a Connected Service -> Web Service pointing to a wsdl or deployed asmx file
From Main Activity create an instance of the generated soap client and call HelloWorldAsync method:
var soapClient = new WebServiceSoapClient(WebServiceSoapClient.EndpointConfiguration.WebServiceSoap);
//Async test
var helloResponse = await soapClient.HelloWorldAsync();
Expected Result: Get string response from HelloWorldAsync() method
Actual Result: I get the deserialization issue mentioned above
I have posted this issue into Microsoft Xamarin Android GitHub but still waiting for reply: https://github.com/xamarin/xamarin-android/issues/7230
I also configured my Xamarin Android app to use Fiddler Proxy and captured Soap request and response and compared them with the request and responses from my Console App and didn't find significant differences. Those are shown in this comment: https://github.com/xamarin/xamarin-android/issues/7230#issuecomment-1207297030