Server group can not join a channel when their join power is high enough

[TS.ChrisR]

This happens when a server group has permission set, but a channel (or channel group in your case) overwrites this permission.

Here is a forum thread to explain and solve that.

Permissions get overwritten by a channel or channel group?

In our permission hierarchy this is a wanted behavior to archive a bigger flexibility of permission setups. But the good news here is that we have ways to avoid the behavior for those who need a simple setup or just don’t want their permissions overwritten. When this happens for your group or users then you have 2 ways to solve this. This way protects all permission the group or user has. We suggest this way in case the group or user is a Admin or Moderator. So lower Channel groups won’t …

Ps. on channel only needed powers should be set. It’s not clear if you meant that.