In the battle about midway through the Undying Mind strike (fighting your way up steps toward a cyclops) an assortment of precursor enemies attack you. Most (if not all) of them are majors. These enemies don't give you glimmer if you have a Blue Polyphage running, and don't count toward a Vex majors bounty. I suspect someone copy/pasted these enemies out of VoG and forgot to check their attributes.