Webhook and e-mail notifications have not been sent since 22:30 UTC on 2021-10-21. The notification service lost its connection to the message queue service and failed to reconnect automatically. This was due to a short network outage between our two Paris datacenters. This issue has been mixed in with others and left unnoticed.
At 11:12 UTC today, the queue has been emptied so all webhooks matching the events during this period have not and will not be sent out. Events from 11:12 to 12:25 UTC have all been sent at once and everything is back to normal since then.