Scenario:

Create a template (ChildTemplate) and link several templates to it (ParentTemplates).
Then create a Host and link the ChildTemplate to it.
Create an action with a Trigger condition configurated pointing to a trigger of any of the ParentTemplates.

Problem:
When in the Host, the trigger is ON, the actions does not "run". It runs if the action is configured with a Trigger condition pointing to either the trigger in the Host directly, or to the ChildTemplate trigger.