Friday September 26, 2025

Summary

Starting around 2:00 PM PDT until around 5:15 PM PDT on September 26, 2025, some users experienced issues with custom internal-built integrations in Slack. Affected apps would return a "rate_limited" error for conversation related APIs such as "conversations.replies" or "conversations.history".

We traced this back to a recent change related to AI-search custom app functionality that inadvertently introduced a rate limiting bug for all custom built apps. This bug was connected to a mis-matched condition logic regarding app types. We reversed this change, resolving the issue for all affected users.

9:19 AM PST

Resolved

The issue is resolved following the successful deployment of a fix to all affected users. We apologise for any inconvenience this issue may have caused.

5:45 PM PST

Investigating

We’re investigating reports of some custom built-internal apps not functioning, and returning errors. We’ll be back with an update once we know more.

5:01 PM PST