Slack deployed a fix today that should fix some of the issues with channel unarchival. We will continue to monitor and update the status accordingly.
Posted Oct 09, 2020 - 18:00 PDT
A Slack bug is causing users to unwittingly be invited to conversations. This is happening specifically with channels that are unarchived from a previous conversation. The user seems to be invited into the channel ~5 minutes after the chat has started. We have escalated the bug as a high priority with Slack's engineering team as the issue appears to be affecting all Chatlio users. We will update you here once we have more information. We’re sorry for any inconvenience this is causing.