Slack’s Monday morning notification mess

Some Slack users found that their notifications weren’t showing up on the platform this morning or that their corresponding messages were harder to find than usual. Slack logged an incident report at 7:52AM ET today, saying: “Notifications may be missing for some users.”

Just before 2PM ET, Slack updated its status message to say, “Users shouold (sic) no longer experience trouble loading threads, adding users to group-DMs, or receiving notifications.” It’s continuing to monitor the issue, but things should be back to normal.

A few of my colleagues reported similar issues on The Verge’s Slack channels, and I’ve been receiving repeated notifications for thread messages that I’ve already marked as read. The issues also seem to be affecting tags for other users — if a colleague hasn’t responded to your pings, DM them directly for now. For myself, at least, the problem caused some notifications to come through, but several minutes after a message was sent.

A connected issue also caused trouble adding new members to multi-person DM’s (group chats for up to nine people.) There’s a visible spike on Downdetector, but very few reports have been logged.

Update, January 27th: Noted Slack update that the problem appears to be resolved.