Does this happen outside of the corner? Kind of stupid, but things like this aren’t too rare.
Unless the hurtbox of Df+hk and/or the hit box of Cammy’s double knee are experiencing inaccurate representation (i.e. Are larger or smaller than they are in other situations), however, it is not a bug, but simply a latent quirk.
To answer the poster above me, Df+Hk can be situationally useful because of its surprise factor and massive safety on block. He was plus after the st mp, so it wasn’t the worst option in the world. It beats techs if done after an AA st lk or b+hk (a favorite maneuver of mine), so maybe that was the goal in this grounded situation. Not sure if he was + enough for the move to hit Cammy in recovery were she to tech.