The webhook payload no longer contains the merchantReferenceId field.  It was working correctly  and the field was present, since we integrated Authorize.Net at the beginning of January 2021.  On 2021-04-14, we started receiving some webhook payloads without the merchantReferenceId.  We use the merchantReferenceId field to match the transaction status with our order record, so we're lost without it.  At first the problem was intermittent, but as of 2021-04-16, the merchantReferenceId is consistently missing on webhook payloads.  I verified that we're still sending the refId, and receive it back in the response of the getHostedPaymentPageRequest.  It's just missing in the webhook call.

Did something change recently to prevent the transmission of the merchantReferenceId field?  Is anyone else experiencing this issue?