Users report intermittent DNS resolution failures inside the cluster. Pods sometimes resolve service names correctly and sometimes time out. You run 'kubectl get endpoints kube-dns -n kube-system' and see two endpoint IPs listed. Checking the CoreDNS deployment, you find both replicas are Running, but 'kubectl get pods -n kube-system -o wide' shows both CoreDNS pods scheduled on the same node, and that node is showing high CPU pressure. What is the MOST likely cause of the intermittent failures and the best remediation?