Two Factor verification being called twice on from post

Question

I'm implementing django-two-factor-auth into a project I'm building. I've gotten two factor to work with a base project without issues. I'm currently running into a problem where the verification check for the token is run twice during post which causes authentication to fail.

To generate this issue subclass LoginView and add override post code below:

class Custom_Login_View(LoginView):

    template_name = 'two_factor/core/login.html'

    def get_form(self, step=None, data=None, files=None):

        return super().get_form(step, data, files)

    def post(self, *args, **kwargs):
        form = self.get_form(data=self.request.POST, files=self.request.FILES)
        form.is_valid()

        return super().post(*args, **kwargs)

It appears the issue is that is_valid is called both in my form and it's parent forms, which is why authentication happens twice. It's very likely I'm doing something to cause my own issue, but I can't figure out how to prevent it, without editing something in django-two-factor-auth.

Am I missing something? Is there a good workaround for this? I think I know a good place to patch django-two-factor-auth to fix it, but I'd rather not have to do that.