Creating a new pipeline in Logstash

Step 1. I have edited the pipelines.yml file, adding a third pipeline to the two already existing.

Step 2. The corresponding configuration file is placed in the /conf.d folder.

Step 3. I stoped and started logstash, expecting a third pipeline to be created.

However, reviewing the logs, I see no mistakes and yet the two initial pipelines are created while the third seems to be ignored. Am I missing some step?

Please share your pipelines.yml, the configuration of the pipeline that is not working and the logstash logs when it starts, showing the running pipelines.