When an Invoice is having prepaid amount adjusted, the QR code generated by ZATCA after clearance is having Invoice Value = Net payable, and VAT amount = VAT before prepaid VAT is adjusted.
In the group, I could see some posts referring to the same issue. (Urgent: QR Code Displaying Misleading Data, Qr Values when prepaid amount is deducted, etc)
But so far, did not find any official reply / confirmation. I request the concerned authorities to provide a clarification asap.