Hi JitteryCoyote63 a few implementation details on the services-mode, because I'm not certain I understand the issue.
The docker-agent (running in services mode) will pick a Task from the services queue, then it will setup the docker for it spin it and make sure the Task starts running inside the docker (once it is running inside the docker you will see the service Task registered as additional node in the system, until the Task ends) once that happens the trains-agent will try to fetch the next Task from the services queue (just to be clear there is a time when the service Task is running, and is registered under the main trains-agent node, then it should "pass" to the newly created node, meaning it is now a "standalone" Task)

What exactly is not working? Does the trains-agent run a single service Task only? Does it run a a single service Task and quits ?