We needed to perform this maintenance in order to upgrade our Redis servers, so that we can maintain reliability of the service.
With this update, our Custom Integrations with Outbound Webhook and Bot support are now in wide release. Please check out this article on Custom Integrations (Bots, Webhooks, API).
We discovered that users in some organizations were encountering significant delays in application start-up while some calculations were performed on the read/unread state of the left navigation bar tabs. We identified a problem and fixed it. This update should drastically improve the start-up time for those users.