django-structlog: Signals do not appear to be working

I’m trying to add some additional request and tracing information via the bind_extra_request_metadata signal, but this does not appear to be working. Here’s a basic handler that can reproduce the issue:

@receiver(signals.bind_extra_request_metadata)
def bind_additional_values(request, logger, **kwargs):
    print("hello")

    logger.bind(test="hello")

I can see the print occurring, but the added key does not appear in the logs. I don’t actually understand how this ever would have worked because bind() returns a new logger with the bound values, it doesn’t actually modify logger. Similarly, I can see that none of the bound values attached in the middleware are logged for the same reason:

https://github.com/jrobichaud/django-structlog/blob/master/django_structlog/middlewares/request.py#L45 https://github.com/jrobichaud/django-structlog/blob/master/django_structlog/middlewares/request.py#L51

Neither request_id nor ip are included in the logs. Was there some older version of structlog where this may have worked? I’m currently using structlog 21.5.0