https://bugs.openldap.org/show_bug.cgi?id=5972
--- Comment #6 from Ondřej Kuzník ondra@mistotebe.net --- If a Delete touches an entry not matching search filter, syncprov will not send out a new cookie to that consumer.
Fixed in MR!471: https://git.openldap.org/openldap/openldap/-/merge_requests/471