You did not see any problem when creating the pod?

Could you

sudo cat /var/lib/rancher/k3s/agent/etc/cni/net.d/10-flannel.conflist

please?

It was quite urgent, so I force deleted the pod before your message arrived. Before I did that, I checked to see if the container was running on the server, using

k3s crictl ps

. It was not running.

Contents of `/var/lib/rancher/k3s/agent/etc/cni/net.d/10-flannel.conflist`:

{
  "name": "cbr0",
  "cniVersion": "1.0.0",
  "plugins": [
    {
      "type": "flannel",
      "delegate": {
        "hairpinMode": true,
        "forceAddress": true,
        "isDefaultGateway": true
      }
    },
    {
      "type": "portmap",
      "capabilities": {
        "portMappings": true
      }
    }
  ]
}

My problem is solved now, but I'll be glad to provide more info if you want to dig into this.

If you are ever able to reproduce the problem, yes please, any extra info would be super helpful