Wednesday May 22 - Tuesday October 15, 2019

Incident

Some customers were unable to @mention user groups

Issue Summary:

Starting May 22, 2019 at 5:12 p.m PDT till 10:23 a.m PDT on May 23, 2019 a subset of our users were unable to successfully @-mention user groups.

During our investigation we realized these issues were caused by a change made a few days prior. We had enabled a feature on our end that caused a caching issue which affected user groups. Our engineering team then implemented a fix that resolved the issue.

We’re hard at work on scoping preventative measures to ensure this doesn’t happen again in the future.

6:30 PM PST

We've got good news: we're in the clear and all @-mentions should now work correctly. We're sorry for any trouble this caused and please drop us a note at feedback@slack.com if you're still having issues.

10:55 AM PST

We're seeing positive signs that user group mentioning is restored for all customers after refreshing Slack. We'll continue to monitor the issue. Please contact feedback@slack.com if you are still seeing troubles with @-mentions.

8:55 PM PST

We've identified the issue and are working to restore the ability to @mention user groups for all customers. If you are affected, please try refreshing Slack (Ctrl+R or Cmd+R) to see these changes.

8:25 PM PST

No new updates to share, but our teams are still digging into why some customers cannot @mention user groups.

7:47 PM PST

We're continuing to investigate the issue with user groups, but we don’t have new information just yet. Thanks for bearing with us.

7:14 PM PST

Some of our customers are unable to @-mention user groups in their workspaces. We're currently looking into this, and we'll keep you posted when we find out more. We're sorry for the disruption.

6:44 PM PST

Some people may be having an issue with Slack. We’re currently investigating and will have more information shortly. Thank you for your patience.

6:38 PM PST

Services affected

Messaging

Status

Resolved