Applied Prepayment amount is 0 on Prepayment invoice after invoice is applied

Summary: I have created an AP Prepayment invoice, Paid and accounted it. I created a standard invoice in the same supplier. I accounted the invoice. I then applied the invoice to the prepayment. The applied prepayment shows the amount of the prepayment. When I click Apply/Unapply prepayment, it shows the prepayment invoice and the application. When I query the Prepayment invoice, it shows 0 in the Applied Prepayments field. When I click Apply/Unapply Prepayment, it says 'Action isnt application for the invoice in its current state.

Should the applied prepayments field not reflect that an invoice has been applied. There is no way to tell that any invoice has been applied to the invoice.