Leaving a group you already left shouldn't be possible

[JammingBen]

When I leave a custom group (as admin user), I can still see and click the "Leave group" button. Clicking it will eventually result in an error.

Also, I'm not sure why I am still able to see the group at all... It that due to my admin role @pmaier1 ?

[pmaier1]

Also, I'm not sure why I am still able to see the group at all... It that due to my admin role @pmaier1 ?

ownCloud administrators can see all Custom Groups in an instance by default, even if they are not members of the groups. This behavior is configurable, though.