when you are in the incident-(or other types)list i.e. list_in.htmpl and want to search for an assignee you cannot search for all assignees. They are restricted to a group.
Assignee-search is limited by additional where: group_list.group IN ( U'1EE5E3436302A940B14747F873C45991' )
I think that this is an error. In list-Search there shouldn't be an additional where restricting on a group.
It's a scorebord search for incidents, open filter, click Assignee
After that open filter in contact - there you see the additional where clause which is filled with 'group in'
The group's UUID used in where seems to be filled randomly.
SDM 17.1.02 German