I also tried to set the service to running in a separate manifest, but as something like `service { puppet } seems to be used in one of the modules already I ended up in a conflict. Probably here, as it corrects the state when I re-run the agent on a node where it was stopped during the former run:

Notice: /Stage[main]/Puppet::Agent::Service::Daemon/Service[puppet]/ensure: ensure changed 'stopped' to 'running' (corrective)