The incident has been resolved.
During the incident we had to block Jira Issue webhook processing, but any updates in Jira since September 16th at 8:30pm have been processed normally.

We are currently monitoring to make sure the system is back to full health. Customers can expect some delay in processing Jira issue updates.

We are continuing to investigate latencies that are causing problems loading the web app. This ties into the incident from yesterday. There is some delay in processing events from Jira as well as a result of this.

We've applied some fixes that have stabilised things, but we are still dealing with some delays in processing events from Jira.