He was doing some defending… he isn’t at the byline because he’s got dozy and wandered out of position. He went to try and stop the cross, someone should be covering that area, usually Downes but Schlotterberg should see Downes isn’t looking and close the shot down. If he does the ball likely doesn’t deflect off him and into the net.
Out of the 3 manning is the least at fault for me.