I created a server-group for an application in a wildfly running in domain mode. This wildfly cluster is composed of a master node and two slave nodes.
I then created two servers in this server group in the two slave nodes.

When I ask through the web console to view details of those servers, they show up correctly:

However, when listing the servers in the cdl server group, only one of them is listed:

As far as I've checked, XMLs are OK, there are no Exceptions in the logs and the application is running fine. Please let me know if further info is necessary.