TALM backup is only reporting the status of one cluster when two are being backed up.  It is not reported a completed backup.  backup-agent pod log for the unreported cluster confirms that backup did in fact complete.  Repeated tests show that no particular cluster is preferred - one test will show status for one cluster, a subsequent test will show status for the other.

4.12

Test was run several times in succession.

Environment consists of a hub cluster with two spokes.

Tests were executed via automation:
https://gitlab.cee.redhat.com/cnf/cnf-gotests/-/blob/master/test/ran/talm/tests/talm_backup.go
Test case "It("should not affect backup on second spoke in same batch" fails, within test suite and as isolated test.

Test case causes one spoke backup to fail, but the other should (and does) back up successfully.  Test doe not pass because cgu is only reporting results for one cluster.

Here is the cgu output.  Note that only one cluster status is shown:

[kni@registry.kni-qe-18 ~]$ oc get cgu -n talm-test generated-cgu-disk-full-multiple-spokes -o yaml 
apiVersion: ran.openshift.io/v1alpha1
kind: ClusterGroupUpgrade
metadata:
  creationTimestamp: "2023-01-12T17:30:41Z"
  finalizers:
  - ran.openshift.io/cleanup-finalizer
  generation: 1
  name: generated-cgu-disk-full-multiple-spokes
  namespace: talm-test
  resourceVersion: "107942509"
  uid: a9c3ef94-2edc-45bf-92c3-f87a0ac913ad
spec:
  actions:
    afterCompletion:
      deleteObjects: true
    beforeEnable: {}
  backup: true
  clusters:
  - ocp-edge87
  - ocp-edge88
  enable: true
  managedPolicies:
  - generated-policy-disk-full-multiple-spokes
  preCaching: false
  remediationStrategy:
    maxConcurrency: 100
    timeout: 250
status:
  backup:
    clusters:
    - ocp-edge87
    - ocp-edge88
    startedAt: "2023-01-12T17:30:41Z"
    status:
      ocp-edge88: Starting
  computedMaxConcurrency: 2
  conditions:
  - lastTransitionTime: "2023-01-12T17:30:41Z"
    message: All selected clusters are valid
    reason: ClusterSelectionCompleted
    status: "True"
    type: ClustersSelected
  - lastTransitionTime: "2023-01-12T17:30:41Z"
    message: Completed validation
    reason: ValidationCompleted
    status: "True"
    type: Validated
  - lastTransitionTime: "2023-01-12T17:30:41Z"
    message: Backup in progress for 1 clusters
    reason: InProgress
    status: "False"
    type: BackupSuceeded
  - lastTransitionTime: "2023-01-12T17:30:41Z"
    message: Cluster backup is in progress
    reason: NotStarted
    status: "False"
    type: Progressing
  copiedPolicies:
  - generated-cgu-disk-full-multiple-spokes-generat-zz6lg
  managedPoliciesForUpgrade:
  - name: generated-policy-disk-full-multiple-spokes
    namespace: talm-test
  managedPoliciesNs:
    generated-policy-disk-full-multiple-spokes: talm-test
  placementBindings:
  - generated-cgu-disk-full-multiple-spokes-generated-policy-disk-full-multiple-spokes-placement-kstpc
  placementRules:
  - generated-cgu-disk-full-multiple-spokes-generated-policy-disk-full-multiple-spokes-placement-kstpc
  remediationPlan:
  - - ocp-edge87
    - ocp-edge88
  safeResourceNames:
    generated-cgu-disk-full-multiple-spokes-generated-policy-disk-full-multiple-spokes: generated-cgu-disk-full-multiple-spokes-generat-zz6lg
    generated-cgu-disk-full-multiple-spokes-generated-policy-disk-full-multiple-spokes-config: generated-cgu-disk-full-multiple-spokes-generated-policy--tmfd8
    generated-cgu-disk-full-multiple-spokes-generated-policy-disk-full-multiple-spokes-placement: generated-cgu-disk-full-multiple-spokes-generated-policy-disk-full-multiple-spokes-placement-kstpc
  status:
    startedAt: "2023-01-12T17:30:41Z"

cgu should show status for both clusters:

status:
  backup:
    clusters:
    - ocp-edge87
    - ocp-edge88
    startedAt: "2023-01-12T17:30:41Z"
    status:
      ocp-edge87: Starting
      ocp-edge88: Starting

Attaching TALM pod logs from hub cluster, taken before and after test execution