Group issue tracker's "assignee filter" searches all users
Summary
When viewing the issues for a group, all users can be searched via "Filter by assignee".
Reported here: https://gitlab.zendesk.com/agent/tickets/67423
Steps to reproduce
- Create a private group
- Create a project in the group
- Create a new issue
- Go to the group issue tracker and search for an assignee from "Filter by assignee"
- Notice that all users on GitLab.com are searched.
What is the expected correct behavior?
Only group members should be searched. This is the case when searching for assignees via the project issue tracker.
Actual behaviour
All users are being searched via "Filter by assignee" on group issue tracker.
Relevant logs and/or screenshots
Output of checks
This bug happens on GitLab.com