Sort by Milestone doesn't sort
When sorting the search by milestone, it will sometimes not actually sort. Problem occurs more often when it's filtered by assignee and when there are multiple pages.
Steps to reproduce
Go to a project, sort search by milestone, filter by assignee.
What is the current bug behavior?
Sorting by milestone doesn't sort properly.
What is the expected correct behavior?
It should sort.
Relevant logs and/or screenshots
Output of checks
This bug happens on GitLab.com