Trouble with Slack - General Slack functionality issues

Final update

This issue is now resolved for all users. Current status and recent actions taken: We deployed a series of configuration adjustments and infrastructure fixes to restore services. Messaging, Workflows, Apps, and Connections were progressively restored over the last several hours. Some users continued to experience permissions-related issues, including inability to manage channels and Canvas edits not saving, as a result of residual stale cache data. Cache deployment activities completed at 14:13 UTC on May 28, 2026, fully resolving the issue. Scope: This issue affected Slack users globally. Previous impact to end users: Slack users experienced difficulties accessing Slack features, including Messaging, Workflows, Apps, Integrations, APIs, Canvas, and Connections, beginning at 22:21 UTC on May 27, 2026. Following an infrastructure change, a cascading scheduling failure caused widespread service impact across all regions and clients. Slack services largely returned to normal operational levels at 05:45 UTC on May 27, with residual impact that remained during the deployment. A brief issue with Canvas surfaced at 10:00 UTC on May 28‌ that lasted until approximately 12:30 UTC. Required

1. Resolved · May 28, 15:22 UTC
   This issue is now resolved for all users. Current status and recent actions taken: We deployed a series of configuration adjustments and infrastructure fixes to restore services. Messaging, Workflows, Apps, and Connections were progressively restored over the last several hours. Some users continued to experience permissions-related issues, including inability to manage channels and Canvas edits not saving, as a result of residual stale cache data. Cache deployment activities completed at 14:13 UTC on May 28, 2026, fully resolving the issue. Scope: This issue affected Slack users globally. Previous impact to end users: Slack users experienced difficulties accessing Slack features, including Messaging, Workflows, Apps, Integrations, APIs, Canvas, and Connections, beginning at 22:21 UTC on May 27, 2026. Following an infrastructure change, a cascading scheduling failure caused widespread service impact across all regions and clients. Slack services largely returned to normal operational levels at 05:45 UTC on May 27, with residual impact that remained during the deployment. A brief issue with Canvas surfaced at 10:00 UTC on May 28‌ that lasted until approximately 12:30 UTC. Required resolution steps: No steps required. We apologize for any disruptions to your day. We'll undertake a full investigation of the incident, establishing the technical trigger, the mechanism of failure, and preventative measures to avoid further disruptions.
2. Update · May 28, 14:09 UTC
   Slack users continue to experience permissions-related issues such as: unable to manage channels, add Canvas to tabs, update statuses, convert public to private channels while we work on a complete restoration. We’ll provide an update in the next 30 minutes or sooner, if additional information becomes available.
3. Update · May 28, 13:35 UTC
   Remediation efforts via configuration adjustments and deployment will take several hours to complete to fully resolve channel management and status issues. Slack users may continue to experience intermittent impact. We'll be back with another update in 30 minutes when we have news to share.
4. Update · May 28, 12:55 UTC
   Remediation efforts via configuration adjustments and deployment are in progress. Users may still run into issues updating their status and managing channels. We’ll provide another update in 30 minutes or as soon as we have more information, and again we are sorry for the inconvenience this is causing.
5. Update · May 28, 12:25 UTC
   Recovery activities continue, and restoration efforts are progressing well. Slack users should now be able to edit Canvases as the errors have dropped. We’ll provide an update in the next 30 minutes or sooner, if additional information becomes available.
6. Update · May 28, 12:01 UTC
   Our work on this issue is still ongoing. Current status and actions being taken: Remediation efforts are underway via configuration adjustments and deployment. We're still working to resolve the issues with Canvas. We'll be back with another update once we have news to share.
7. Update · May 28, 11:46 UTC
   We continue to investigate the issue, and are‌ gathering the resources necessary to restore services. We’ll provide another update in 30 minutes or as soon as we have more information, and again we're sorry for the inconvenience this is causing.
8. Update · May 28, 11:17 UTC
   Users continue to experience issues with their ability to manage channels, Canvas edits not saving, and user statuses not clearing or updating correctly. Investigations are underway. We're working with urgency to improve platform stability and reduce impact. We’ll provide an update in the next 30 minutes or sooner, if additional information becomes available.
9. Update · May 28, 10:45 UTC
   We continue to investigate the issue and are working with urgency to improve stability and reduce impact. We’ll provide another in 30 minutes or sooner, including further details on current actions being taken. We're sorry for the inconvenience this is causing.
10. Update · May 28, 10:04 UTC
    We're investigating a new impact to Slack. Current impact to end users: Slack users are experiencing issues with managing channels, statuses aren't clearing or updating correctly, and edits on Canvas aren't being saved. We'll provide an update within 30 minutes including further details on current actions being taken.
11. Update · May 28, 05:47 UTC
    Slack services have largely returned to normal operational levels. Messaging, Workflows, Apps, Integrations, APIs, and Connections have all been restored. We'll continue with the final restoration activities and we'll provide updates as significant developments occur.
12. Update · May 28, 05:13 UTC
    Slack services continue to progress through the final stages of ‌recovery activities to restore functionality across all services. We’ll provide an update in the next 30 minutes or sooner, if additional information becomes available.
13. Update · May 28, 04:30 UTC
    Recovery activities continue, and restoration efforts are progressing well. Platform stability is improving, and no further customer impact is expected. We’ll provide an update in the next 60 minutes or sooner, if additional information becomes available.
14. Update · May 28, 03:55 UTC
    We’re glad to inform you that the Workflow Builder job backlogs were cleared and workflow execution has returned to normal. We continue progressing through the final stages of recovery activities across affected service areas as overall platform stability improves. We’ll provide an update in the next 30 minutes or sooner, if additional information becomes available.
15. Update · May 28, 03:22 UTC
    Cleanup and recovery efforts continue. Workflow builder job backlogs are being drained. Event subscriptions have been re-enabled. No further impact is expected. We’ll provide an update in the next 30 minutes or sooner, if additional information becomes available.
16. Update · May 28, 02:46 UTC
    Workflow builder jobs that were triggered during the disruption period have been replayed and will complete over the next several hours. We’ll provide an update in the next 30 minutes or sooner, if additional information becomes available.