What is the correct way to refund an ended reducing balance deduction?

Summary:

What are the recommended steps to refund a reducing balance deduction after it has been end dated?

Content (please ensure you mask any confidential information):

Scenario - an employee has a reducing balance voluntary deduction at payroll relationship level. The employer has agreed to cancel the deduction and refund last month's deduction. Retro is not enabled on this element because that doesn't play nicely with reducing balance deductions.

The recurring element has been end dated to prevent any more deductions being taken.

We have tried entering an override element entry on the Results element, which generates a run result with the correct value but for some reason this doesn't feed any balances so the amount is not actually refunded. We have also tried it without the override flag, same result.