Retro price adjustment entry not get generated when PO price is changed?

Summary:

I would like to understand why the retro price adjustment entry not get generated when PO price is changed prior to invoice being validated?

When an invoice is matched to a PO line but goes on hold, it is not validated at this point. If the PO price is adjusted prior to the invoice being revalidated, the retro price adjustment entry is not generated. Once the invoice is validated because now the PO price matches the invoice price, there is no Invoice Price adjustment entry either.

This causes a receipt accrual balance which has to either be manually corrected by undoing the prices adjustment and then correcting the receipt, then changing the price and correcting the receipt again or adjusting the receipt accrual balance.