You roll the damn bar forward during your set up. And then the bar path isn't perfectly vertical.
Top of page 106, 3rd Edition
I roll the bar forward because when I set up it's too far back over my shoe. By the time I'm done moving it back and forth, it's where it should be over my mid-foot. Unfortunately, you cannot see this in the video. The bar bath is a little wonky at the top because that's when I straighten my slacked lower back.