I am using Cybersource payment method with an embedded iframe. For some users it started to return an error when trying to load the iframe.
In the front end the iframe is never loaded and I can see the following error in the order log "No transaction number sent to callback" (image attached)
Even after clearing the cart and trying to do a new order the issue persists.
Could this be something Cybersource is not sending over? Should there be a check for a transaction number when the iframe is just loading and the payment is not being made yet?
DW version 9.6.6