register_connected_account doesn't seem to correctly apply the _xfRedirect field

[Jake B.]

When logging in with Google/Twitter/another OAuth provider for the first time you are prompted to choose a username. After this, you get redirected back to the index page rather than the page you were on previously even though $redirect is being passed into the template with the correct URL. It doesn't seem to be getting passed into the <xf:redirect /> tag, so it just defaults to the index page