Custom filter in LDAP provider is not used

1. install LDAP server 2. configure LDAP federation provider against the LDAP server with "Username LDAP attribute" = uid "UUID LDAP attribute" = uid "Custom User LDAP Filter" = (title=manager) 3. access http://localhost:8080/auth/realms/master/account/ 4. login as a user in LDAP, then you will see that the custom filter is not used for searching for a user: 13:08:59,389 TRACE [org.keycloak.storage.ldap.idm.store.ldap.LDAPOperationManager.perf] ( default task-58) LdapOperation: lookupById baseDN: ou=people,dc=redhat,dc=com filter: (&(objectClass=*)(uid=user1)) searchScope: 1 returningAttrs: [uid, modifyTimestamp, createTimestamp, sn, cn, mail] took: 25 ms When "UUID LDAP attribute" = entrydn, the issue does not occur and the custom filter is used: 13:12:36,100 TRACE [org.keycloak.storage.ldap.idm.store.ldap.LDAPOperationManager.perf] ( default task-14) LdapOperation: search baseDn: ou=people,dc=redhat,dc=com filter: (&(title=manager)(uid=user1)(objectclass=inetOrgPerson)(objectclass=organizationalPerson)) searchScope: 1 returningAttrs: [uid, modifyTimestamp, createTimestamp, sn, cn, mail] resultSize: 0 took: 19 ms