On Sunday, February 16, 2020, we had an issue that caused our webhook system to fail. Though we resolved the issue, webhooks from during the day were delayed.
Transactions starting at 5:30pm Pacific Time (UTC -08:00) sent fine, but we are currently working on pushing earlier transactions that didn't send properly through our webhook system. We will update this post when all webhooks have been sent.
CLARIFYING EDIT, 2020-02-16 11:50pm Pacific Time: This impacted the webhooks that send after a successful transaction. Customers would not have seen any indication of a problem, nor was the communication with payment gateways impacted. (ie. All credit card charges would have succeeded or errored normally, as that happens before the webhook system is involved.)
UPDATE 2:40am PST, 2020-02-17: All transactions are being re-sent.