R12.1.3 - Buyer Work Center allows buyer to use Workflow "Skip" functionality

I've noticed that from the Orders form in the Buyer Work Center, a buyer can view the current workflow progress of a Purchase Order.   (Action LOV -> View Approval Work Flow)

The buyer cannot open the workflow notification ("no access") but they can use the Skip button that is present on the form to progress the workflow past its current approver.

I think I may be able to prevent this by adding function exclusions for "Workflow Guest Activity History" and "Workflow Guest Self-Service Activity History" to all user responsibilities that should not be able to use the Skip functionality.   However it seems like a bug that the Skip functionality is enabled for non-workflow administrators in the first place.