Slack experienced a minor incident on June 1, 2026, lasting 57m. The incident has been resolved; the full update timeline is below.
Update timeline
- investigating Jun 01, 2026, 02:08 AM UTC
We are currently investigating a partial degradation impacting usergroups. We’ll provide an update as soon as we have more information to share and are sorry for any inconvenience this issue is causing.
- investigating Jun 01, 2026, 02:38 AM UTC
We continue to investigate the issue and have identified a recent deployment as a likely trigger. Users may experience issues with user groups, including failed @mentions or groups appearing unavailable. We are actively working on restoring functionality and will provide another update as soon as possible.
- resolved Jun 01, 2026, 03:05 AM UTC
Our investigation has determined that the issue is isolated to a single customer environment and is not impacting the broader service. As a result, this incident will be removed from the status page and we will continue to work directly with the affected customer to address their issue.