1-Admin -> Control Panel
2-Click Users & organization
3-Click Search All Users
4-Just above (on the left), click in advanced search icon.
5-Fill any field.
Expected: search result will come with right results.
Actual: search form isn't used at all.
Seems that search form in right part is interfering. For example,PopOver is linked to both search boxes (both hides when one of them disappears).
Some important search form fields aren't sent properly, for example "advancedSearch" field hasn't the portlet namespace.