Monday September 15, 2025

Summary

From September 15, 2025, at around 11:00 PM PDT, through September 18, 2025, at around 9:30 PM PDT, some users may have experienced an issue with unread items in their Activity view. Specifically, the badge indicating unread items would not disappear even after the activity was read.

We traced the issue back to a recent change in how the Slack client handles the item row within the Activity view, which introduced this bug. We also determined this was related to a similar badging issue that occurred on September 11, 2025. We rolled back the problematic change, resolving the issue for all affected users.

7:36 AM PST

Resolved

We’ve rolled out a fix and Activity badges are now working as expected. If you’re still encountering any trouble, please reload Slack using Command + Shift + R (Mac) or Ctrl + Shift + R (Windows/Linux). Thank you for your patience while we sorted out this issue.

12:27 PM PST

Update

We're still investigating this issue and will share an update as soon as we have news. For now, affected users can try a temporary workaround by hard reloading their Slack app (Cmd/Ctrl + Shift + R), as this appears to be related to a previous bug with similar symptoms.

6:03 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.

11:13 PM PST