Organization Roles doesn't work

Organization Roles doesn't work

Hi
in Service Catalog / workflow, when I set Approver to Specific Users everything is fine.
But When I Selected Site Roles or Department Roles Approver, it doesn't work!!

1. I set user as technician and tick Approver check box
2. I add user to Site Manager as a Approver
3. I set Stage One to Site Manager
4. In Request form the Site field is correctly chooised.
my SDP number : 11.0 Build 11010

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