Also, one of the images chosen to display the absence of the object in question, is one of the worst images in terms of quality / clarity.
Furthermore, the object sits in the lee of a bloodied fold. If that lee can only be seen from certain angles, then your argument of parallax could be responsible for the seeming lack of the object in question. If you can only see the unbroken column of blood (where you would normally see the object) from certain angles, then this could also be down to perspective. As a poster pointed out - the gap where there is no blood cannot just suddenly become covered in blood.