Wrong linstor_volume_state metrics for non-replicated volumes

[maxpain]

Hello. I use two storage classes in my cluster:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nvme-lvm-local
provisioner: linstor.csi.linbit.com
parameters:
  linstor.csi.linbit.com/storagePool: nvme-lvm
  linstor.csi.linbit.com/layerList: "storage"
  linstor.csi.linbit.com/allowRemoteVolumeAccess: "false"
volumeBindingMode: WaitForFirstConsumer
allowVolumeExpansion: true

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nvme-lvm-replicated-async
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: linstor.csi.linbit.com
parameters:
  linstor.csi.linbit.com/storagePool: nvme-lvm
  linstor.csi.linbit.com/autoPlace: "2"
  linstor.csi.linbit.com/layerList: "drbd storage"
  linstor.csi.linbit.com/allowRemoteVolumeAccess: "false"
  property.linstor.csi.linbit.com/DrbdOptions/Net/protocol: "A"
volumeBindingMode: WaitForFirstConsumer
allowVolumeExpansion: true

The linstor_volume_state metric shows 4 and 1 for drbd volumes, but -1 for non-drbd volumes. Is it intended behavior, or is it a bug? I want the grafana dashboard to be green :)