{member_id} does not parse in a template

EE.2.9.2 does not parse the {member_id} in  {exp:raw_member_field field_name="custom_email" member_id="{member_id}"}

Instead, replaced $memberId with a session variable. Ends up with shorter code in template with one less parameter.

So its now {exp:raw_member_field field_name="custom_email"}