just looking at it... if you nock an arrow, only on the string without the block under it, you will see that the string is straight from cam to cam. Now slide the block forward and you will see that the arrow nock and string rises up when the block goes under the string to hook up your loop and activate the anti-dryfire device. When you draw the bow the block goes even higher right before the notch then settles in the notch. The notch is on the same plane as the rest of the slide so your string is still sitting up on the block in the cocked position. When you pull the trigger the string comes off of the block and while moving forward it also returns to the same height it was before the block was slid under it which pushed it upward... so naturally it is dropping off the block during the shot. It's definitely not a flaw. It's how it is made. Its just the way it is designed to operate. The only way to change it would to be a redesign of the block to keep the string on the same plane all the time, but then you would lose much of the downward pressure on the anti-dryfire device. If the string did not have to lift up on the block to keep pressure on it then the block and release mechanism would end up being "sloppy" with up and down movement. This pressure is what keeps all of these things tight. It's not a big deal, in my mind, as long as the bow can be properly papertuned. It is what it is.