in some cases, updating record with employer overwrites activity_date_time field in civicrm_activity table

Under certain circumstances (involving contacts that have memberships via relationships), when a contact is saved, CiviCRM deletes existing relationships and then re-creates them, which seems to be the cause of the updated activity_date_time field.

The relationship is re-created with the proper values, but the related activity is created with the current date/time, rather than the date/time of when the relationship was initially created, thus losing that data.

The code responsible seems to be in the CRM/Contact/BAO/Relationship.php file, in the relatedMemberships() functions - toward the bottom:

if ( $action & CRM_Core_Action::UPDATE )

{ //delete the membership record for related //contact before creating new membership record. CRM_Member_BAO_Membership::deleteRelatedMemberships( $membershipId, $relatedContactId ); }

CRM_Member_BAO_Membership::create( $membershipValues, CRM_Core_DAO::$_nullArray );

I'm not sure if it's possible to avoid deleting and then re-creating or if there's another way around the problem.