Description of problem:
Deploy logging and eventrouter, the eventrouter can't gather event logs, lots of error message in the eventrouter pod:

I0721 00:23:52.890323       1 reflector.go:240] Listing and watching *v1.Event from github.com/openshift/eventrouter/vendor/k8s.io/client-go/informers/factory.go:73
E0721 00:23:52.904347       1 reflector.go:205] github.com/openshift/eventrouter/vendor/k8s.io/client-go/informers/factory.go:73: Failed to list *v1.Event: v1.EventList: Items: []v1.Event: v1.Event: ObjectMeta: v1.ObjectMeta: readObjectFieldAsBytes: expect : after object field, but found u, error found in #10 byte of ...|:{},"k:{\"uid\":\"30|..., bigger context ...|},"f:metadata":{"f:ownerReferences":{".":{},"k:{\"uid\":\"303e9c69-80bf-4001-9ccf-25c8f1f4c14e\"}":{|...
I0721 00:23:53.904461       1 reflector.go:240] Listing and watching *v1.Event from github.com/openshift/eventrouter/vendor/k8s.io/client-go/informers/factory.go:73
E0721 00:23:53.922332       1 reflector.go:205] github.com/openshift/eventrouter/vendor/k8s.io/client-go/informers/factory.go:73: Failed to list *v1.Event: v1.EventList: Items: []v1.Event: v1.Event: ObjectMeta: v1.ObjectMeta: readObjectFieldAsBytes: expect : after object field, but found u, error found in #10 byte of ...|:{},"k:{\"uid\":\"30|..., bigger context ...|},"f:metadata":{"f:ownerReferences":{".":{},"k:{\"uid\":\"303e9c69-80bf-4001-9ccf-25c8f1f4c14e\"}":{|...



Version-Release number of selected component (if applicable):
ose-logging-eventrouter-v4.5.0-202007172106.p0
cluster version: 4.5.0-0.nightly-2020-07-20-152128 


How reproducible:
In some clusters, it's 100% reproducible, in some clusters, no such issue

Steps to Reproduce:
1.deploy logging
2.deploy eventrouter in openshift-logging namespace with:
kind: Template
apiVersion: v1
metadata:
  name: eventrouter-template
  annotations:
    description: "A pod forwarding kubernetes events to cluster logging stack."
    tags: "events,EFK,logging, cluster-logging"
objects:
  - kind: ServiceAccount 
    apiVersion: v1
    metadata:
      name: cluster-logging-eventrouter
      namespace: ${NAMESPACE}
  - kind: ClusterRole 
    apiVersion: v1
    metadata:
      name: event-reader
    rules:             
    - apiGroups: [""]
      resources: ["events"]
      verbs: ["get", "watch", "list"]
  - kind: ClusterRoleBinding  
    apiVersion: v1
    metadata:
      name: event-reader-binding
    subjects:
    - kind: ServiceAccount
      name: cluster-logging-eventrouter
      namespace: ${NAMESPACE}
    roleRef:
      kind: ClusterRole
      name: event-reader
  - kind: ConfigMap
    apiVersion: v1
    metadata:
      name: cluster-logging-eventrouter
      namespace: ${NAMESPACE}
    data:
      config.json: |-
        {
          "sink": "stdout"
        }
  - kind: Deployment
    apiVersion: apps/v1
    metadata:
      name: cluster-logging-eventrouter
      namespace: ${NAMESPACE}
      labels:
        component: eventrouter
        logging-infra: eventrouter
        provider: openshift
    spec:
      selector:
        matchLabels:
          component: eventrouter
          logging-infra: eventrouter
          provider: openshift
      replicas: 1
      template:
        metadata:
          labels:
            component: eventrouter
            logging-infra: eventrouter
            provider: openshift
          name: cluster-logging-eventrouter
        spec:
          serviceAccount: cluster-logging-eventrouter
          containers:
            - name: kube-eventrouter
              image: ${IMAGE}
              imagePullPolicy: IfNotPresent
              resources:
                limits:
                  memory: ${MEMORY}
                requests:
                  cpu: ${CPU}
                  memory: ${MEMORY}
              volumeMounts:
              - name: config-volume
                mountPath: /etc/eventrouter
          volumes:
            - name: config-volume
              configMap:
                name: cluster-logging-eventrouter
parameters:
  - name: IMAGE  
    displayName: Image
    value: "image-registry.openshift-image-registry.svc:5000/openshift/ose-logging-eventrouter:latest"
  - name: MEMORY 
    displayName: Memory
    value: "128Mi"
  - name: CPU  
    displayName: CPU
    value: "100m"
  - name: NAMESPACE  
    displayName: Namespace
    value: "openshift-logging"
3.check eventrouter pod logs

Actual results:


Expected results:


Additional info:
must-gather: http://file.apac.redhat.com/~qitang/must-gather.tar.gz