BasicAuth Middleware + Cert-Manager on Kubernetes

Traefik Traefik v2 (latest)
1

Hello!

I am currently trying to deploy the following Ingress:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: foo
  namespace: bar
  annotations:
    kubernetes.io/ingress.class: "traefik"
    traefik.ingress.kubernetes.io/router.middlewares: bar-foo-middleware@kubernetescrd
    cert-manager.io/cluster-issuer: production-cert-issuer
spec:
  rules:
  - host: logs.example.org
    http:
      paths:
      - backend:
          service:
            name: log-svc
            port: 
              number: 6666
        path: "/"
        pathType: Prefix
  tls:
  - hosts:
    - logs.example.org
    secretName: foo-cert

The middleware reads:

apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: foo-middleware
  namespace: bar
spec:
  basicAuth:
    secret: htpasswd

And that, for the most part, works. Basic Auth? Works like a charm. ACME? No.

The challenge component complains of the following issue:

Status:
  Presented:   true
  Processing:  true
  Reason:      Waiting for http-01 challenge propagation: wrong status code '401', expected '200'
  State:       pending
Events:
  Type    Reason     Age   From          Message
  ----    ------     ----  ----          -------
  Normal  Started    19s   cert-manager  Challenge scheduled for processing
  Normal  Presented  18s   cert-manager  Presented challenge using http-01 challenge mechanism

Naturally, it works when I remove the basic authentication middleware, but wasn't Træfik supposed to exempt the .well-known endpoint from the middleware? I know that's the case with Træfik's internal certificate management system. But what about Cert-Manager?

Any help with this would be appreciated! Thanks! (: