Slack incident
Users May Not Receive Notifications on Slack Thread Replies
Resolved after 3 hours 24 minutes, affecting Notifications, on April 27, 2026.
We’ve successfully performed a rollback in the production environment, and all systems are now functioning as expected. Users should no longer experience any issues with thread replies not generating a notification banner. We apologize for any inconvenience and appreciate your patience.
Affected components
Update timeline
- investigating Apr 27, 2026, 05:11 PM UTC
Some users have reported issues with thread replies not generating a notification banner. We’re investigating the issue, and have identified a recent deployment as a possible trigger. We apologize for the inconvenience and will report back as more information becomes available.
- investigating Apr 27, 2026, 06:07 PM UTC
We’re observing positive signals after rolling back the deployment in test environments. We will complete some final validations before rolling back the deployment in the production environment. Thank you for your patience as we work through this one. We’ll report back once production rollback is completed or if there are substantial updates to share.
- resolved Apr 27, 2026, 08:36 PM UTC
We’ve successfully performed a rollback in the production environment, and all systems are now functioning as expected. Users should no longer experience any issues with thread replies not generating a notification banner. We apologize for any inconvenience and appreciate your patience.
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