Thursday August 5, 2021


Users may be seeing an error that Slack has stopped responding

Issue summary:
On August 5, 2021 from 12:00 p.m. to 3:10 p.m. PDT, Slack may have become unresponsive for customers accessing channels to which an email link had been posted.

A planned change inadvertently caused issues with email links, and Slack became caught in a loop while trying to render these links. This manifested as a "Slack stopped responding" popup.

We reverted the change, resolving the issue for all affected users.

2:50 AM PST

We've released a fix for this issue, and Slack is up and running once again. Please perform a hard refresh by hitting Command + Shift + R (Mac) / Ctrl + Shift + R (Windows). We’re sorry for the disruption this has caused.

3:25 PM PST

We’ve identified the cause of the issue and we’re working on getting a fix out as soon as possible. We’ll be back with another update as soon as there's one to share.

2:32 PM PST

If you're not currently experiencing any errors in Slack, please do not reload your app or browser. We're still investigating the issue but we'll provide new information as soon as it’s available.

1:48 PM PST

Some customers may be seeing an error that Slack has stopped responding. We're investigating and will be back with an update as soon as we have more information to share.

1:33 PM PST

Services affected





A small portion of users may be encountering slowness and sporadic errors

Issue summary:
On August 5, 2021 from 5:25 a.m. to 9:52 a.m. PDT, a small number of customers may have experienced intermittent slowness or errors in Slack.

A network event caused connectivity issues across part of our infrastructure. We worked to mitigate its effects as the system recovered, then verified that full functionality had been restored for all affected users.

Note: After further investigation, we've modified the times in this summary to more accurately reflect the duration of this issue.

2:48 AM PST

Customers that saw issues with intermittent slowness or errors should no longer be having trouble, and we've confirmed Slack is back to normal. Sorry for the hassle while we sorted this out.

1:00 PM PST

Intermittent slowness or errors may persist for a very small subset of users. The source of the issue has been identified and work continues towards a fix. We'll post updates here as we have them.

8:47 AM PST

A very small portion of users may still be encountering errors or slowness in their workspaces. We're continuing to work on the problem and will update again when we have more information.

7:30 AM PST

Some customers may be experiencing actions slow to respond and sporadic errors. Our team is currently investigating and we'll provide another update as soon as we have more information to share.

6:04 AM PST

Services affected