This incident has been resolved.

A fix has been implemented and we are monitoring to ensure continued stability of this feature.

The cause of this issue has been identified and a fix is being implemented.

We are continuing to investigate this issue.

Our monitoring systems have detected email delivery delays of app-generated emails such as those generated from automation rules, sheets sent as an attachment, Update and Approval requests.
We are investigating and will provide an update within the next 30 minutes.