tacker scaling+monitoring feature has issues in monitoring

When a vnf with following template is created, 2 VDUs are created as apart of 1 vnf (default_instances=2).
Monitoring is enabled and hence, monitoring framework will try to ping host ["u'a', u'b'] where a and b are ips assigned to vdus. This will fail with unknown host error and vnf will be re spawned (failure: respawn) . This will happen continuously creating an unstable vnf.

tosca_definitions_version: tosca_simple_profile_for_nfv_1_0_0

description: sample-tosca-vnfd-scaling

metadata:
  template_name: sample-tosca-vnfd-scaling

topology_template:
  node_templates:
    VDU1:
      type: tosca.nodes.nfv.VDU.Tacker
      capabilities:
        nfv_compute:
          properties:
            num_cpus: 1
            mem_size: 512 MB
            disk_size: 1 GB
      properties:
        image: cirros-0.3.4-x86_64-uec
        mgmt_driver: noop
        availability_zone: nova
        monitoring_policy:
          name: ping
          actions:
            failure: respawn
          parameters:
            count: 3
            interval: 10
            monitoring_delay: 45
            timeout: 2
        config_drive: true

    CP1:
      type: tosca.nodes.nfv.CP.Tacker
      properties:
        management: true
        anti_spoofing_protection: false
      requirements:
        - virtualLink:
            node: VL1
        - virtualBinding:
            node: VDU1

    VL1:
      type: tosca.nodes.nfv.VL
      properties:
        network_name: net_mgmt
        vendor: Tacker

  policies:
    - SP1:
        type: tosca.policy.tacker.Scaling
        properties:
          increment: 1
          cooldown: 60
          min_instances: 1
          max_instances: 8
          default_instances: 2
          targets: [VDU1]