The max_ref_dropdown attribute is breaking reference.

1. Navigate to Incident > Create New.
2. Right-click on Assigned To and select Configure Dictionary.
3. In the Attributes tab or section, click New.
4. In Attribute, add max_ref_dropdown.
5. In Value, type in 500.
6. Click Submit.
7. In the Reference Specification tab or section, check that the Reference qual condition field contains no conditions. If there are conditions, delete them.
8. In the Dependent tab or section, check that the Dependent field contains assignment_group.
9. Click Update to save all changes to the Dictionary Entry record.
10. Navigate to Incident > Create New.
11. Set Assignment group.
12. Set Assigned to.
    Note that the dependency is broken. Values in Assigned to are not dependent on Assignment group field.
    
    
    
    
     

There is no known workaround for this issue. The problem is no longer reproducible in Helsinki and onwards.