Note that the same thing is occurring along the left arm as well (e.g. the text "scandinavian").

The first thing to understand is that; at every point on the objective lens there is a complete image of the scene, as seen from that point. And aperture (objective area recorded) is essentially the stacking of those multiple images at the image plain. That's how you can have a 300mm f/5.6 lens and a 300mm f/2 lens which both record the same field of view... the f/2 lens just has a much larger objective element (max entrance pupil) which can collect many more images (more light).

In this case it is primarily due to the very short distance to a small subject; and it's not much different from holding your finger up to determine if you are right-eye or left-eye dominant. I.e. the right edge of the lens can see around the left arm of the near subject; whichever image distance is focused will be primary and the others will be blurred/ghosted to some degree (i.e. transparent).

The three points on the lens in the first drawing represent three of the images available from the objective lens, w/ the blue subject in focus and dominating (farther points front focused/blurred). In the second image the far subject is in focus/dominating and the front subject is significantly backfocused/blurred.