Wednesday December 15, 2021


Some users may experience loading issues in Slack

Issue summary:
On December 15, 2021 from 7:20 a.m. to 7:41 a.m. PST, a small number of users in North America had trouble loading the Threads and Mentions & reactions pages.

Some also experienced message send failures, while a smaller percentage of these users may've observed delays in message delivery via email.

We moved messaging traffic away from the region, restoring Slack functionality for affected users.

4:30 PM PST

We believe the loading and email delivery issues have been resolved. If you continue to have any trouble, please reach out to us at

9:16 AM PST

Users may still be unable to load threads, mentions & reactions. We're continuing to investigate these along with the email delivery issues some users are experiencing. We greatly appreciate your patience, and will let you know as soon as we have another update to share.

8:54 AM PST

Some users may be experiencing issues loading threads, mentions & reactions and trouble with email delivery. We’re currently investigating the issue and will provide a status update once we have more information.

8:24 AM PST

Services affected