Error during the payment update

Hello Team,

I found the following error with payments.

1. I have created a payment via API. The payment is being created successfully.
2. Then I use a payment to allocate with invoice or credit memo via API to pay it.
3. Send the payment with allocation to the invoice or credit memo to Acumatica via API.

Acumatica returns the following error message:

Payment update request returns the error message - "exceptionMessage": "An error occurred during processing of the field Reference Nbr.: Reference Nbr. 'AR.......' cannot be found in the system.\nPX.Data.PXOuterException: An error occurred during processing of the field Reference Nbr.: Reference Nbr. 'AR......' cannot be found in the system."

When I repeat the same Payment update request after a period of time (in 1,5,10,20 minutes), Acumatica creates a payment successfully.

Could you clarify what is the reason of this behavior?