cfr_References Field discrepancy

[Aniformer]

Hi,

One of the output provided by this API endpoint : https://www.federalregister.gov/api/v1/documents/2019-03474.json
gives us the CFR references listed under the 'cfr_references' key value. For this particular granule- 2019-03474 there are 3 cfr_references present.

Although if you look at the corresponding ECFR link for that particular granule - 2019-03474 :
https://www.federalregister.gov/documents/2019/03/14/2019-03474/eliminating-unnecessary-
tax-regulations,
under the "List of Subjects" subheading you will see that that are multiple cfr_references that are not present in the API output.

Is this discrepancy expected? Any insight into this would be helpful!