Webmail change password not working for addon domain

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http://forums.cpanel.net – I'm using (Release Tier). A user account is setup with a primary domain and an addon domain. The primary domain does not have emails, but the addon does. When an email user logs into webmail using [email protected] and clicks change password, they see the error: You are not allowed to change the password for the user “[email protected]”. Notice how it uses the primary domain when it should be using the addon domain. Any thoughts? Bug? (HowTos)