Node group is null when using existing security groups and key pairs

As discussed on the user mailing list, group Id for a new node is null when using createNodesInGroup (https://jclouds.apache.org/reference/javadoc/1.9.x/org/jclouds/compute/ComputeService.html#createNodesInGroup%28java.lang.String,%20int,%20org.jclouds.compute.domain.Template%29) with existing key pairs and security groups.