Contacts APIv3 returning blank values for custom fields

All custom fields are coming in as blank values when accessing the following endpoint:

POST /crm/v3/objects/contacts/batch/read

This seems to be a regression since the custom fields used to come through just fine.

@dimitri1

Could you add your json body here so we can see what you requesting?

Nothing changed with how we were making the request, however it appears to
have been fixed over the weekend so you can close the ticket.