The user filter suggests users that are not part of the search result

As a instructor, enter to a site with several groups Go to Roster tool By default, the search returns all the site students Switch the groups in the group filter and try to filter by students who are not in that group. The filter suggests the students' name even though they are not in that group (in fact, the filter suggests the name of all the site students whereas it should only suggest the name of the students who are part of the search result).