Kubernetes CluterIssuer Challenge timeouts

Setup: DigitalOcean K8S Cluster w/ 2 nodes and 1 Ingress-NGINX LoadBalancer (no special configuration) I was wondering why certificate requests fail and found in the logs of the Challenge, that the self check GET request runs into timeout: Waiting for http-01 challenge propagation: failed to perform self check GET request ‘http…’ … dial tcp PUBLIC_LOADBALANCE_IP:80…