Ingress / IngressClass warnings without context

Traefik Traefik v2 (latest)
1

I'm migrating from Traefik v1 to Traefik v2 on Kubernetes, which for the most part went smoothly. However, with the default log level of error, I keep getting the following warnings every few minutes:

W0201 14:56:13.094995       1 warnings.go:67] extensions/v1beta1 Ingress is deprecated in v1.14+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress
W0201 14:58:14.503537       1 warnings.go:67] networking.k8s.io/v1beta1 IngressClass is deprecated in v1.19+, unavailable in v1.22+; use networking.k8s.io/v1 IngressClassList
W0201 15:02:37.103488       1 warnings.go:67] extensions/v1beta1 Ingress is deprecated in v1.14+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress
W0201 15:04:43.505009       1 warnings.go:67] networking.k8s.io/v1beta1 IngressClass is deprecated in v1.19+, unavailable in v1.22+; use networking.k8s.io/v1 IngressClassList
W0201 15:08:43.102637       1 warnings.go:67] extensions/v1beta1 Ingress is deprecated in v1.14+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress
W0201 15:13:43.507436       1 warnings.go:67] networking.k8s.io/v1beta1 IngressClass is deprecated in v1.19+, unavailable in v1.22+; use networking.k8s.io/v1 IngressClassList
W0201 15:18:21.104688       1 warnings.go:67] extensions/v1beta1 Ingress is deprecated in v1.14+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress

I tried switching to debug level, but the surrounding statements do not seem related to the warnings.

I only have one IngressClass defined, which is traefik v2. Its api version is networking.k8s.io/v1:

$ kubectl get ingressclass -o yaml | grep -i apiversion
apiVersion: v1
- apiVersion: networking.k8s.io/v1
    - apiVersion: networking.k8s.io/v1

For the Ingress, Traefik-v2 is set to only listen to ingresses with a specific annotation:

- args:
          - --api.dashboard=true
          - --ping=true
          - --providers.kubernetescrd
          - --providers.kubernetesingress
          - --providers.kubernetesingress.ingressclass=traefik-internal
         [...]

However, as I'm using the CRD provider and IngressRoutes for v2, there are no Ingress objects with that annotation:

$ kubectl get ingress -o yaml -A | grep -i traefik-internal

There are Ingresses that use the deprecated API, but those are all annotated with the traefik v1 annotation (kubernetes.io/ingress.class: traefik), and should be ignored by v2.
Is there any way I can get more context, so I can figure out which objects are causing these warnings?

Traefik version: 2.4 (installed through helm), Kubernetes version: 1.19.7