Serverless-offline: Throwing exception in nodejs doesn't trigger API Gateway response

When running in AWS, an async lambda-proxy function that throws an exception causes a response to be sent back to the client with HTTP 500.
When doing the same in serverless-offline, this doesn’t happen and the request/response never completes until a timeout occurs. Is there something I need to do in configuration or code to make this work in serverless-offline or is this a bug?

Sorry to bump this, just curious if someone else can try this out before I go and create a github issue