Tuesday September 21, 2021


Some customers being logged out of the mobile app

Issue summary:
On September 21, 2021 from 11:25 a.m. to 3:12 p.m. PDT, some users may have been logged out of the mobile app and prompted to sign in again.

A standard token rotation exposed a conflict in our infrastructure. The rotation process itself proceeded smoothly, but some parts of our software didn't handle the rotation as expected. This inadvertently caused authentication issues for some users.

We reverted the rotation, resolving the issue for all affected customers.

Note: We've updated the summary to more accurately reflect our understanding of the issue.

12:31 AM PST

The issue has now been resolved, and users should be able to log into the mobile app as usual. If there is any remaining trouble, please reach out to feedback@slack.com.

4:21 PM PST

We're seeing continuing improvements and remain focused on resolving this for all affected users. Updates to follow.

3:55 PM PST

We're seeing signs of improvement as we continue to evaluate. We will provide another update as soon as we have more information to share.

3:23 PM PST

We are continuing to look into this issue. We'll provide another status update in 30 minutes.

2:51 PM PST

We previously stated that this was only impacting Android users, but have now determined that this is occurring on both the Android and iOS mobile apps.

Our team is working hard to resolve this issue, and we'll be in touch once we have more information to share.

2:07 PM PST

We're still investigating the issue, but we don't have additional information just yet. We'll be back in 30 minutes with another update.

1:31 PM PST

Some customers may be experiencing an issue where they're being logged out of Slack on their Android mobile device. We're currently investigating and will be back with an update shortly.

12:58 PM PST

Services affected