All four servers (master & replica) show the same contextCSN values: dn: dc=umd,dc=edu contextcsn: 20190522130320.956183Z#000000#001#00000020190520190418.183747Z#000000#001#000000 (uid=xyz,,dc=umd,dc=edu)
So it looks like they've been processing changes. What makes you think there is an error?
You didn't answer a number of my other questions which would have been helpful, such as this bit I noted before:
"Additionally, without the specific syncrepl configurations from the consumers (do they listen to both? do they only listen to one?) there's additional levels of variability. If they listen to both masters, then it wouldn't be uncommon for them to receive the change from master A and ignore the change from master B."
--Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>