Use of enum type causes schema builder to fail

[aaronpowell]

If an Object Type is using a GraphQL enum, the schema will fail to build.

Here's an example schema:

enum Foo {
    Bar
}

type Model @model {
    id: String!
    foo: Foo!
}

Here's the error in the console:

fail: Microsoft.AspNetCore.Server.Kestrel[13]
      Connection id "0HMK73NKBA43B", Request id "0HMK73NKBA43B:00000027": An unhandled exception was thrown by the application.
      HotChocolate.SchemaException: For more details look at the `Errors` property.
      
      1. Unable to resolve type reference `None: FooOrderByInput`. (HotChocolate.Types.InputObjectType)
      
         at HotChocolate.Configuration.RegisteredType.GetType[T](ITypeReference typeRef)
         at HotChocolate.Types.InputField.OnCompleteField(ITypeCompletionContext context, ITypeSystemMember declaringMember, InputFieldDefinition definition)
         at HotChocolate.Types.FieldBase`1.CompleteField(ITypeCompletionContext context, ITypeSystemMember declaringMember)
         at HotChocolate.Types.FieldBase`1.HotChocolate.Types.Helpers.IFieldCompletion.CompleteField(ITypeCompletionContext context, ITypeSystemMember declaringMember)
         at HotChocolate.Internal.FieldInitHelper.CompleteFieldsInternal[TField](ITypeCompletionContext context, ITypeSystemMember declaringMember, TField[] fields)
         at HotChocolate.Internal.FieldInitHelper.CompleteFieldsInternal[TFieldDefinition,TField](ITypeCompletionContext context, ITypeSystemMember declaringMember, IEnumerable`1 fieldDefinitions, Func`3 fieldFactory, Int32 fieldCount)
         at HotChocolate.Internal.FieldInitHelper.CompleteFields[TFieldDefinition,TField](ITypeCompletionContext context, ITypeSystemMember declaringMember, IReadOnlyList`1 fieldDefs, Func`3 fieldFactory)
         at HotChocolate.Types.InputObjectType.OnCompleteFields(ITypeCompletionContext context, InputObjectTypeDefinition definition)
         at HotChocolate.Types.InputObjectType.OnCompleteType(ITypeCompletionContext context, InputObjectTypeDefinition definition)
         at HotChocolate.Types.TypeSystemObjectBase`1.CompleteType(ITypeCompletionContext context)
         at HotChocolate.Configuration.TypeInitializer.<CompleteTypes>g__CompleteType|27_0(RegisteredType registeredType)
         at HotChocolate.Configuration.TypeInitializer.ProcessTypes(TypeDependencyKind kind, Func`2 action)
         at HotChocolate.Configuration.TypeInitializer.CompleteTypes()
         at HotChocolate.Configuration.TypeInitializer.Initialize()
         at HotChocolate.SchemaBuilder.Setup.InitializeTypes(SchemaBuilder builder, IDescriptorContext context, IReadOnlyList`1 types, LazySchema lazySchema)
         at HotChocolate.SchemaBuilder.Setup.Create(SchemaBuilder builder, LazySchema lazySchema, IDescriptorContext context)
         at HotChocolate.SchemaBuilder.Create(IDescriptorContext context)
         at HotChocolate.SchemaBuilder.HotChocolate.ISchemaBuilder.Create(IDescriptorContext context)
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaAsync(NameString schemaName, RequestExecutorSetup options, RequestExecutorOptions executorOptions, IServiceProvider serviceProvider, TypeModuleChangeMonitor typeModuleChangeMonitor, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaServicesAsync(NameString schemaName, RequestExecutorSetup options, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.GetRequestExecutorNoLockAsync(NameString schemaName, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.GetRequestExecutorAsync(NameString schemaName, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorProxy.GetRequestExecutorAsync(CancellationToken cancellationToken)
         at HotChocolate.AspNetCore.HttpPostMiddlewareBase.HandleRequestAsync(HttpContext context, AllowedContentType contentType)
         at HotChocolate.AspNetCore.HttpPostMiddlewareBase.InvokeAsync(HttpContext context)
         at Microsoft.AspNetCore.Builder.EndpointRouteBuilderExtensions.<>c__DisplayClass13_0.<<UseCancellation>b__1>d.MoveNext()
      --- End of stack trace from previous location ---
         at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
         at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
         at Azure.DataApiBuilder.Service.AuthenticationHelpers.AuthenticationMiddleware.InvokeAsync(HttpContext httpContext) in /home/vsts/work/1/s/src/Service/AuthenticationHelpers/AuthenticationMiddleware.cs:line 87
         at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
         at Azure.DataApiBuilder.Service.Startup.<>c__DisplayClass8_0.<<Configure>b__2>d.MoveNext() in /home/vsts/work/1/s/src/Service/Startup.cs:line 280
      --- End of stack trace from previous location ---
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)

[jacksorjacksor]

Has there been any insight into this issue? We've run into the same problem ourselves so would appreciate guidance!
TIA!