what happened was DGH played a shot which took him out of the crease and his it his pads, england appealed for LBW which wasn't given but DGH didn't make any attempt to return to his crease
it's a very different situation
not the same, the NZ player out of his crease in the middle of an over and the ball is clearly live. He was just confused as there was an LBW appeal and never made it back to his crease (which bairstow did)