Making an GameObject a child or another GameObject makes sprites dissapear

Editor Gif

I'm having this weird issue where the sprites disappear when I make them a child of another game object. This only happens under the child object called "body" (if you watch the gif) and not any of the other child objects. Also, when I make the object a child of "body", I then cannot then move any of the object's children, the gizmo seems to be stuck on place. Is this some sort of obscure bug, or am I missing something obvious?