Help me understand the need for unique response data typing

[ditchcode]

I have a C# project using two response types sharing the same name but are in different namespaces, namespace1.A and namespace2.A
I have one endpoint that returns namespace1.A and one endpoint that returns namespace2.A
Each endpoint has its own unique path and OperationId
Swagger fails to load with error message:

"Failed to load API definition. Fetch error response status is 500 /swagger/v1/swagger.json"

Through troubleshooting I observe that swagger requires the return type to be uniquely identifiable.
So if I rename one of the return types, for example, if I rename namespace2.A to namespace2.B, then swagger can detect things correctly.

There has to be a better alternative to this.
Is SwaggerDiscriminator supposed to resolve this? Because applying that on the response types did not seem to help.