Many "found different TLS options for routers on the same host" errors

I am running Traefik 2.6.1, serving many services from docker containers.

Majority is configured as follow:
docker1:

- "traefik.http.routers.${TAG}.rule=Host(`www.mydomain.com`) && PathPrefix(`/path1`)"

docker2:

- "traefik.http.routers.${TAG}.rule=Host(`www.mydomain.com`) && PathPrefix(`/path2`)"
- "traefik.http.routers.${TAG}.tls.options=noclientauth@file"

etc etc

Some of the services require a client certificate and others don't need a client certificate to get https access. I have a tls options defined as follow (removed some stuff not relevant for this topic):

tls:
  options:
    default:
      clientAuth:
        caFiles:
          - /etc/traefik/certificates/ca.crt
        clientAuthType: RequireAndVerifyClientCert
    noclientauth:
      clientAuth:
        clientAuthType: NoClientCert

All works fine, except the noclientauth@file.

I get the following error in for some of the routers:
found different TLS options for routers on the same host www.mydomain.com, so using the default TLS options instead

It is pretty random for which router I get this error. When I stop one of the "offeding" docker container, the error appears for another router...

AFAIK, I don't have any overlapping routers.

Clueless..........