http proxy settings not working for outbound remote storage requests

Start nx3 for the first time. empty storage.
Add an HTTP proxy to Nexus.
Trust the SSL certificate my proxy serves using the SSL Certificates UI ( this works fine and goes through proxy)

GET http://localhost:8081/repository/maven-central/abbot/abbot/0.13.0/abbot-0.13.0.pom

Request is 200 and works, but request does not go through proxy server

tested nexus-professional-3.0.0-20150423.044744-931-bundle