Convert within Ingest Pipeline not outputting Target field

I am using a Convert processor in an Ingest Pipeline, attempting to convert a field from a Keyword type to a Double type. No error is thrown when I test a document through my pipeline. However, I have opted to direct the converted value to a Target field, and that target field is not appearing in my output. What else am I required to do to get the new target field in my output? We appear to be using Version 7.17.2.