Outage in Slack

Activity badge display issue

Resolved Minor
September 12, 2025 - Started about 17 hours ago - Lasted about 12 hours
Official incident page

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Outage Details

We are investigating an issue where the Activity badge may continue to show an unread count even after all messages have been read. We are actively engaged in resolving this and minimizing any impact. We will share an update as soon as we have more information. We sincerely apologize for any inconvenience this may be causing.

Components affected
Slack Notifications
Latest Updates ( sorted recent to last )
about 7 hours ago - at 09/12/2025 04:20PM

We’ve identified the cause and are working on a forward fix. In the meantime, users may now try hard-refreshing their Slack app (Cmd/Ctrl + Shift + R) as a workaround to the stuck Activity badge. We’ll be back with another update once we have news to share. Thanks for your patience.

about 17 hours ago - at 09/12/2025 06:06AM

We are investigating an issue where the Activity badge may continue to show an unread count even after all messages have been read. We are actively engaged in resolving this and minimizing any impact. We will share an update as soon as we have more information. We sincerely apologize for any inconvenience this may be causing.

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