Very interesting wM Service problem

In an Process step I am invoking an update adapter service, and a SMTP built-in service. Body of this email is the input parameter for the adapter service.

This processmodel subscribes to a document. When a publish the document to the broker, the processmodel successfully subscribes to the document and complete all the steps. But the adapter service does not update the target field in the database.

When I do savePipeline and restorePipeline, and run this process step in developer step by step the update adapter service is invoked successfully and the target field is updated.

What is the problem here? Why does the adapater service not update the field when the process model is succesfully completed?

Best Regards