There are obvious examples of faces getting targeted by zombie bites, but the undead don’t generally aim to rip forehead flesh off before chowing down on visible arm meat; and it was arm meat they appeared to be munching on when Rick interrupted them.
Jadis did seem to have some extra concern when looking around and surveying the area.
In the Pro column, we can list that this dude’s face looks pretty cleanly sliced off, as opposed to being savagely chomped on by walkers.
Plus, it has been regularly speculated that Jadis and her junkyard group end up becoming the Whisperers in some way, so it may be no coincidence that they were around whenever this faceless character was found.