New fun with @SlackHQ...create a private channel, invite a bot and another person. Leave the channel. The other person can't leave. They have to invite someone else before they can leave.
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This is still a problem
@SlackHQ
Why not just let channels have no one in them and auto-ping an admin so they can delete it if necessary...
A channel can't be left with zero members. If you don't have permission to archive channels then you're stuck. This is a bug and we'll try to fix it! 
Sorry for the trouble. Could you try refreshing your Slack instance a few times, to see if this updates the channel members list? If you're on the desktop app, you can do this by pressing Cmd/Ctrl+R. If that doesn't work, could you please write us at feedback@slack.com?
Wydaje się, że ładowanie zajmuje dużo czasu.
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