Confirm that the service that is invoked when your trigger receives the specified document uses the fully qualified name of the publishable document type as its input. If you name it something else or have a typo in the document type name, the service will still be invoked, but the data will not be placed into the document that you expect.
Adding a pub.flow:tracePipeline call at the top of the triggered service will 1) confirm that your service is being invoked and 2) show you exactly what data is being placed into your service’s pipeline.
HTH,
Mark
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