https://bugs.openldap.org/show_bug.cgi?id=9779
--- Comment #6 from mail@andrejro.de --- Sorry for the typos in my comments here, as these were to illustrate my problem and I was not at the top of my game already while typing.
I just reproduced in the openldap test harness with a correct search filter, at least it seems correct to me. This search returns an empty set but it should return all members not in this Alumni Assoc Staff group, e.g "cn=Barbara Jensen" and more objects.