Provisioning Roles In Different DN's Based on Rules Fails with UDF as expression attribute

When using LDAP Sync you should be able to control where the roles are stored based on rules contained in the LDAPContainerRules.xml file, which is stored in MDS as /db/LDAPContainerRules.xml.  When using a UDF named "Role Location" added to the Roles form as the expression to determine the DN in which to store new Roles that meet this expression, the Role is always stored in the Default DN, even though the expected matching <container> tag value is assigned to the read-only "Namespace" attribute.
Here is the role section of my LDAPContainerRules.xml file:

<role>
    <rule>
        <expression>Role Location=APPLICATIONS</expression>