change default configuration within the ${infinispan.cluster.stack:XXX} does not have an effect

If a different stack should be configured within the XML configuration

<cache-container name="default" statistics="true">
<transport cluster="${infinispan.cluster.name:MyCluster}" stack="${infinispan.cluster.stack:someDifferent}" node-name="${infinispan.node.name:}"/>

 this will not have any effect, the default tcp stack is used as long as ${infinispan.cluster.stack} is set. The default "tcp" is set hardcoded.
This is confusing if the stack should be changed inside the configuration with the <jgroups> element.

Also the cluster.name is set hardcoded instead of using the :default from expression