Find RAC services not running on all preferred instances

I think I ran this SQL a few years ago against OEM repository to see all the services that are supposed to run on certain RAC database instances but are actually not:

col database_unique_name for a10
col cluster_name for a20
col service_name for a30
col preferred_instances for a35
col running_instances for a35
select database_unique_name, cluster_name, service_name, preferred_instances, running_instances
from sysman.mgmt_rac_services
where preferred_instances != running_instances
order by 1, 2, 3, 4;

The result contains some lines that are clearly incorrect if we trust the result of "srvctl status service" run on the target database command line or "select * from gv$active_services" inside the target database.