The search function does not search tags.
The issue filtering system does not let you filter by tag.
The only way to browse issues by tag is to first visit a ticket which has that tag and then click on it.
Search results could do with highlighted excerpts.
For example, a search which returns a result matching a comment should ideally let you know the result was found in a comment on a ticket and show a little excerpt, possibly below the ticket title.
Same goes for if a search matches text from the main body of the ticket, an excerpt should be shown so the user can see at a glance where the search matches.
However, a query for all users (with a *) "http://localhost:9000/admin/users?query=*" don't return any results it still shows label 'photo of' and icons related.
The same goes for empty search box...