Location and host groups are not working together


I'm using Foreman 1.8.2. Within Foreman I created an organisation and a
location. Beside the puppet master itself I have one additional agent with
correctly assigned location and organisation.

Now I added a host group to the location assigned to that puppet agent.
This host group should add one class. But running "/etc/puppet/node.rb
<agents_fqdn>" doesn't show the classes being aaplied to the configuration
of that agent.

Does anyone have a hint how to solve this?

Thanks in advance,