Thursday September 11, 2025

Summary

From 1:50 PM PDT on September 9, 2025, until 7:46 AM PDT on September 12, 2025, some users had an issue where the Activity tab in Slack would show an unread count badge even when there was no new activity.

This was caused by a recent backend change that unintentionally prevented unread badges from clearing. We've rolled back the problematic code and pushed out a fix. All affected users should no longer run into this issue. Should any users still be experiencing this, please hard refresh your client (Cmd/Ctrl + Shift + R).

10:59 AM PST

Resolved

The issue users experienced with stuck Activity badges has been resolved. If users are experiencing any trouble, they may consider hard-refreshing their app using Command + Shift + R (Mac) or Ctrl + Shift + R (Windows/Linux) in order for this fix to be reflected on your end.

Again, we’re sorry for any inconvenience this issue may have caused you.

10:53 AM PST

Cause Identified

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.

9:20 AM PST

Investigating

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.

11:06 PM PST