I notice that if I delete the metadata in AEM when looking at the CRX, but if I download the file it still has metadata and XMP saved

Hello, I have a workflow in AEM that is responsible for cleaning the metadata of my PDFs in the DAM. The issue is that it doesn't delete all the metadata; it seems to only delete it from the environment but not from the document when I download it again. It also appears that the XMP metadata persist...