Summary: Our VAN provider changed their process to handle duplicate transactions on January 13, 2020. After the change, several customers connected with their trading partners through our VAN provider were not sent inbound transactions. The investigation has shown that the change done by our VAN provider changed the behavior of the polling system that was configured. This resulted in some inbound transactions being removed from the mailbox before being processed by the polling system.
Permanent solution: We made a behavior change of the polling system of our VAN provider mailbox so that inbound transactions stay in the mailbox until they are processed by the polling system. We see that the issue has been resolved as Inbound transactions are coming through as expected, but we’ll monitor the processing of the VAN mailbox over the next days