In my opinion it's okay to not be able to pinpoint the exact problem, thats what I tried to imply by using the quotations.
This is why I position myself as Consultant and Engineer, because you will know you have a problem with your cluster, and I should know how to solve it.
When you are at the point, where your question is: "I need someone to fix my internal ingress-controller because traefik binds all services to the public one", you might simply need to open an issue with the developers of traefik.
Yet if your problem is: "we would like to completly separate internal traffic from external traffic inside our own datacenter", you are looking for the kubernetes devops guy with the neccesairy experience.