How to Cancel Req when the Budgetary Control is turned on

Summary

Unable to Cancel a Req when the Budetary Control is turned on.

Content

The Budgetary Control is turned on for a BU. Now once the PO is in Open status -- at a later point we needed to cancel the PO. 

On Cancelling the PO the REQ is not cancelled though we have the Cancel backing Req set as Optionally.

I see this note: 

No Option Given In Cancel Requisition During Cancel The Purchase Order (Doc ID 2113592.1) So this tells me that the REQ cannot be cancelled even though the option is set in the Configure Requisition Functions. My question is how can we cancel the Req?