Outage in Slack
Trouble adding multiple users to channels
Resolved MinorIncident Report
Summary AI Generated
Slack experienced a 4.9-hour incident where users encountered "multiple matches" errors when attempting to add multiple users to channels, with the system failing to properly identify team members. This issue also prevented subsequent workflows from triggering as expected. The problem was resolved after engineers identified the root cause and deployed a fix.
Some users may experience issues when attempting to add multiple users to channels. Multiple matches error may appear along with a failure to identify team members. This may cause subsequent workflows not to trigger. We're investigating and will let you know as soon as we know more.
Components affected
Slack Workspace/Org AdministrationTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
about 5 hours ago - at 06/09/2026 05:39PM
Our work on this issue is still ongoing.Current status and actions being taken: We have identified the trigger for this issue and a fix is in the process of deploying. The progress is being monitored and we’ll provide an update as soon as the fix is completely deployed and verified.We'll be back with another update once we have news to share.
about 7 hours ago - at 06/09/2026 03:24PM
Some users may experience issues when attempting to add multiple users to channels. Multiple matches error may appear along with a failure to identify team members. This may cause subsequent workflows not to trigger. We're investigating and will let you know as soon as we know more.
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