Front page access denied redirects logged in user to '/r4032login' rather than back to the frontpage

To reproduce, turn off access to the front page and log out. The url then reads like this:

/user/login?destination=r4032login

and when a user logs in, they land on an access denied page rather than on the front page.

This only happens if the setting r4032login_redirect_authenticated_users_to is left blank. Setting that is sometimes not an option though since some access denied pages should be shown to authenticated users (eg, if they somehow get a link to edit a node they are not allowed to, redirecting them somewhere without a message is confusing).