Symptoms
Reference qualifier on change_request.assignment_group does not work on Standard Change Proposal "Change Request values"
Release
Kingston, London
Cause
"Change Request values" variable from "Propose a new Standard Change Template" record producer is a Macro-type variable and it is controlled by a UI Macro named: std_chg_template_val_render
Resolution
Create a Before Query type business rule on sys_user_group to get the same result as a reference qualifier.