Monday April 12, 2021


Messages aren't being marked as read successfully on iOS for some customers

Issue summary:
On April 12, 2021 at 9:31 a.m. PDT, we began investigating reports that customers using the latest version of our iOS app were unable to mark messages and channels as read.

By April 13, 2021 at 1:30 p.m. PDT, we determined that this was not a widespread issue. We have plans to deploy a fix in the near future, and we will investigate reports individually moving forward.

11:05 PM PST

We appreciate your patience while we've continued to investigate this issue. While customers may still be impacted, our team has narrowed down the issue and we'll continue to work on it as a high priority bug. As such, we'll be closely monitoring reports and working towards a fix. Please note that this may take some time and likely won't be ready until a new version of the app is released. We apologize for any inconvenience and if you're still experiencing this behaviour, please reach out to us at

11:32 AM PST

Some customers using the latest version of our iOS app are seeing their messages remain marked as unread and the channels bolded even after reading the channel and navigating away. Our team are currently investigating and we'll be back with any updates as they happen.

9:53 AM PST

Services affected