Advanced JQL Search does not Respect User email visibility Hidden

Problem

The advanced JQL autocomplete functionality is still showing email addresses, ignoring the User email visibility option.

• Basic mode does not show emails
• See screenshots

Steps to Reproduce

• Set User email visibility to Hidden
  • JIRA Administration > System > General Configuration > Edit > User email visibility > Hidden > Update
• Verify the emails are hidden in all locations except for the Issue Navigator's advance searching, see screenshots

Cause

REST api returns prepared data with emails inside.

curl -H "Authorization: Basic XX" -H "Cache-Control: no-cache" http://127.0.0.1:8080/rest/api/1.0/jql/autocomplete?fieldName=reporter&fieldValue

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<autoCompleteResultsWrapper>
    <results>
        <value>a</value>
        <displayName>a a - htoussi@atlassian.com  (a)</displayName>

expected

    <results>
        <value>a</value>
        <displayName>a a -  (a)</displayName>