dotnet-svcutil cannot handle recursively nested XSD structures

Here is an excerpt from our WSDL definition. The structure oel_CmisExtensionTypeList is recursively nested:

```

```
To generate the WCF class this command was used:
`dotnet-svcutil http://localhost:17089/wsdl --namespace "*, COI.SOAPConnector" --internal --sync --reference "c:\Program Files\dotnet\sdk\8.0.100\Microsoft\Microsoft.NET.Build.Extensions\net461\lib\System.Collections.dll" --noStdLib --outputFile BflowWSDL.cs --targetFramework "net8.0"
`

The generated class (I also tried dotnet-svcutil 2.1.0, it does not work either) looks like this:
```
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Tools.ServiceModel.Svcutil", "2.2.0-preview1.23462.5")]
[System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
[System.ServiceModel.MessageContractAttribute(WrapperName="ObjectService__performTaskActionRequest", WrapperNamespace="http://www.coi.de/bflowsoap", IsWrapped=true)]
internal partial class ObjectService__performTaskActionRequest
{
[System.ServiceModel.MessageBodyMemberAttribute(Namespace="http://www.coi.de/bflowsoap", Order=0)]
public string username;

[System.ServiceModel.MessageBodyMemberAttribute(Namespace="http://www.coi.de/bflowsoap", Order=3)]
[System.Xml.Serialization.XmlArrayItemAttribute("item")]
public COI.SOAPConnector.COI.SOAPConnector.oel_CmisExtensionType[] extension;
```
The definition of _extension_ contains two errors: Firstly, the namespace COI.SOAPConnector appears twice:
COI.SOAPConnector.COI.SOAPConnector.oel_CmisExtensionType[]
and secondly, the XSD definition contains a reference to oel_CmisExtensionTypeList, not to oel_CmisExtensionType

The svcutil used with .NET6 has generated the correct code here.
Even if the duplicate namespace is corrected manually, the transfer of values in extension.any no longer works.