All existing criteria is categorized as "reported by" instead of the actual parameter type.

Works best if you start from a query saved as a url
1 - Open your saved query, note the results
2 - Click the ADVANCED SEARCH link
3 - Notice that the first Advanced search field is defaulting to REPORTED BY
4 - Click SEARCH, notice the difference in results

Here is initial url... https://bitbucket.org/***/enterpriseweb/issues?milestone=Release+Update+10&status=new&status=open

Here are the initial results... note parameter categories at the top of milestone and status

Click on advanced search, and this is what it looks like... all parameters assigned to "reported by".