Amazon EKS node group Spot instance

I've updated a managed node group from on-demand to SPOT and since I'm getting some network issue : mountVolume. SetUp failed to volume "web-krups-config": failed to sync configmap cache : timed out waiting for the condition MoutVolume.SetUp failed to volume "nri-integrations-cfg-volume" : object "newrelic"/"newrelic-bundle-nrk8s-integrations-cfg" not registered network is not ready: container runtime network not ready : NetworkReady=false reason:docker : network plugin is not ready : cni config uninitialized

Any idea or best practices to follow to understand the root cause & fix this issue ? Pods on this node group seems to be in running state ~15 minute and move to pending state.