The customer using OADP v1.3.0 running using a third-party csi-drivers that sets the restoreSize of the VolumeSnapshots to 0, which is causing issues while exposing the snapshots using DataMover.

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
...
status:
...
  readyToUse: true
  restoreSize: "0" 

  message: 'error to expose snapshot: error to create backup pvc: error to create
    pvc: PersistentVolumeClaim "xxxxxxxxxxxxxxxxxxx" is invalid: spec.resources[storage]:
    Invalid value: "0": must be greater than zero' 

According to the upstream code, this was be fixed on: https://github.com/vmware-tanzu/velero/pull/6976 starting on velero 1.13 

According to our version relationship this is not currently available on the velero version shipped with OADP, so might be required to backport this issue to OADP v1.3.0