C# Client Library when generated through openapi-generator-cli adds two authorization headers

We have created a microservice using nest js. we are using openapi-generator-cli to generate client sdks. We are using swagger to consume open api definition. We have configured OAuth2 for 'Try it out' on Swagger UI to work with protected routes and also configured bearer Auth using documentbuilder.addOAuth2().addBearerAuth().
While generating client SDK for angular apps, it works perfectly fine -

But while generating client SDK in C# dotnet core using "openapi-generator-cli generate -g csharp-netcore -o XYZ/ -i openApi.json --additional-properties packageName=XYZ", we are unable to use it since two authorization headers were added in the generated code. It returns 401 on every API call through client SDK.

Open API Generator Version - 2.3.5

https://github.com/OpenAPITools/openapi-generator-cli/issues/394

Reproduce the issue with the openApi.json definition and the openapi-generator-cli command using the csharp-netcore generator. Inspect the generated C# SDK's authorization handling with the OAuth2 and bearer authentication configuration, then verify that generated API calls send only the intended authorization header and no longer return 401.