[389-users] 389-DS Internal unindexed search

Hi, I have a problem in 389-ds version 1.3.10.2-10 intalled on Centos7 , we have a multimaster enviroment with consumers and suppliers, we have referential integrity plugin to control the group members. In the master node where we have the referential integrity pluggin enabled, ocasionally we get this message in the error log : NOTICE - ldbm_back_search - Internal unindexed search: source (cn=referential integrity postoperation,cn=plugins,cn=config) search base="c=es" scope=2 filter="(member=*uid=dmarmedr,ou=Baja de cuentas,c=es)" conn=0 op=0 NOTICE - ldbm_back_search - Internal unindexed search: source (cn=referential integrity postoperation,cn=plugins,cn=config) search base="c=es" scope=2 filter="(uniquemember=*uid=dmarmedr,ou=Baja de cuentas,c=es)" conn=0 op=0 NOTICE - ldbm_back_search - Internal unindexed search: source (cn=referential integrity postoperation,cn=plugins,cn=config) search base="c=es" scope=2 filter="(owner=*uid=dmarmedr,ou=Baja de cuentas,c=es)" conn=0 op=0 NOTICE - ldbm_back_search - Internal unindexed search: source (cn=referential integrity postoperation,cn=plugins,cn=config) search base="c=es" scope=2 filter="(seeAlso=*uid=dmarmedr,ou=Baja de cuentas,c=es)" conn=0 op=0 And when it happends the slapd proccess takes up to 100% CPU usage and we see the message you can see bellow, because this master node begins to avoid replication sessions from other master nodes: ERR - NSMMReplicationPlugin - process_postop - Failed to apply update (615f51ea000000230000) error (51). Aborting replication session(conn=1145 op=4) All those internal unindexed searchs have filters with the attributes configured in the referential integrity plugin, member=*, uniquemember=*, owner=* and seealso=*. Those attributes has equality and presence indexes, we don't understand why the log says "internal unindexed search". Can anyone help me with this problem?, maby is it necessary other type of index? Thanks & Regards