No prometheus metrics from kured on a control plane node

[amrap030]

Hello, I am running kured with Helm in the version 5.5.0 and kured v1.16.0 in my Kubernete Cluster with v1.31.1. I want to use prometheus and grafana to monitor kured, so I enabled the service monitor via the Helm values with the following configuration:

metrics:
    create: true
    namespace: ""
    labels:
      release: kube-prometheus-stack
    interval: 60s
    scrapeTimeout: ""

I have 3 nodes in my cluster, 1 control plane and 2 worker nodes. For some reason, prometheus only catches the metrics of the pods on the worker nodes and not of the pod on the control plane, see image below.

If I set hostNetwork: true in the Helm values, it works fine, see image below.

However, I don't want to set hostNetwork: true. Do you have an idea what might be the problem here?

[evrardjp]

We don't treat the master and workers any differently.

So at first sight, I don't know... Maybe a netpol? @ckotzbauer do you have an idea?