A pull request from several months mentions a caveat to gunicorn. I've left a comment that I am not experiencing any issue with gunicorn even though I am not implementing this pull request: 2eee98a.
So could you please explain this caveat. If the caveat no longer exists, then this is just reminder that the current documentation might be outdated in this regard.
I think this may have to do with the worker_class using along with gunicorn.
Another possible issue is that the django models are called/used before they are validated.