I have a member login form on my frontend site, using the {exp:member:login_form} tag. When a registered member is logged in, I display a link to their control panel if they are in a Member Group that has access to the CP.
The problem is that when they click on the CP link, they are shown the backend login form - their logged-in status or session is not carried through to authenticate them on the backend.
Is this a known bug, or is there something I have to do to make it work as expected?