Index metadata does not change after add_to_index or delete_from_index

[newmanar]

After I built an index, I thought I was being clever by reading in docid_metadata_map.json to be able to review metadata and select documents I want to work with. However, when adding (add_to_index) or removing (delete_from_index) from the index, it appears that while the operations seem successful, the docid_metadata_map.json and pid_docid_map.json files are not updated.

Is this expected behavior? I'd think we'd want to have those files updated to allow for effective metadata management.

Thanks for any insights.