get_resource fails in list

It seems that calling functions like a get_resource in lists in HOT template does not work.

When I use template like this:
  mylb:
    type: OS::Neutron::LoadBalancer
    dependson: server2
    properties:
      pool_id: { get_resource: pool }
      protocol_port: 80
      members: [c420bb4c-c748-47b1-a068-505683341ba5, 4d366207-f6de-41cf-b0d0-7b1f1a371a0b]

It works perfectly, but when I use something like this:

  server1:
    type: OS::Nova::Server
    properties:
      name: server1
      image: { get_param: image }
      flavor: { get_param: flavor }
      key_name: { get_param: key_name }
      networks:
        - port: { get_resource: server1_port }

  mylb:
    type: OS::Neutron::LoadBalancer
    dependson: server2
    properties:
      pool_id: { get_resource: pool }
      protocol_port: 80
      members: [ {get_resource: server1} ]

or

  mylb:
    type: OS::Neutron::LoadBalancer
    dependson: server2
    properties:
      pool_id: { get_resource: pool }
      protocol_port: 80
      members:
      - { get_resource: server1 }

it does not work with the same error:

WARNING heat.engine.resources.nova_utils [-] Instance ({u'get_resource': u'server1'}) not found: Instance could not be found

And this leads to neutronclient error:

TRACE heat.engine.resource NeutronClientException: Invalid input for address. Reason: 'None' is not a valid IP address.

It seems that HOT template parser does not handle function calls in lists.