2020R1(S1):Receipt Advice-Able to receive negative Quantities

Environment: JAT
Build: CFA - 20.1.0.2571
Store: 00198 - Northwest Arkansas Mall
User: System Admin
Day: Tue, Sep 25th, 2019
Page:
https://m.inform.jatesting.cfahome.com/#/Inventory/Order/History/Received/2104717

Added a negative Received quantity to the Receipt Advice:
</cac:ReceiptLine>
<cac:ReceiptLine>
<cbc:ID>322</cbc:ID>
<cbc:Note>Lemonade Gallon</cbc:Note>
<cbc:ReceivedQuantity>-3</cbc:ReceivedQuantity>
</cac:ReceiptLine>

The log file is attached with the error of not being able to serialize member:
Event : 9/25/2019 6:46:53 PM : Data Import on 9/25/2019 6:46:53 PM : Record #1 parsed
Task threw exception System.InvalidOperationException: There was an error reflecting type 'Mx.BusinessObjects.ReceiptAdviceImport'. ---> System.InvalidOperationException: There was an error reflecting property 'LineItems'. ---> System.InvalidOperationException: There was an error reflecting type 'Mx.BusinessObjects.ReceiptAdviceDetailImport'. ---> System.InvalidOperationException: Cannot serialize member

But no error was generated and no alert/auto-notification was sent.