We're pushing batch Contact updates through the bilk import API endpoints.   When only change to a contact is a changed custom field value, the "Date Edited" field on the Contact does not seem to change. I see the new value for the custom field on the Contacts through the web interface, but Date Edited is stuck on a date from 3 weeks ago.   We have a custom field "lastSyncDate" formatted as yyyyMMdd. This allows us to work out which contacts have not been included in the bulk sync for a while.   By including this field, we expected the standard "Last Edited" field on the Contact would have been updated, so we could use the GET /contacts?updated_before=yyyy-MM-ddd  endpoint to discover our stale contacts and remove them.   Am I missing something here? Why is the contact_udpated_at field not changing? ... View more