If someone with an admin permission set attempts to test the "Add control panel user" functionality by entering their own email address, they can inadvertently reduce their permissions.
It would be ideal to have some mechanism in place to block admins from submitting this form with a current control panel user's email address.
Hey Lauren, that makes total sense. We don't have any plans at the moment to update permissions but we'll definitely keep this in mind when we do.
Please follow and comment if you run into this!