Atelier Meruru: The Apprentice of Arland [BLES01593]

Seems to be a misbehaving vertex shader. See http://pastebin.com/UvGyyD4i.
The odd while loop there is used to simulate branching instructions with jump offsets.
The executable blocks without conditions are what concerns me since they are creating unreachable code

Here is how it's supposed to look: https://youtu.be/IrZnZzQuvh4?t=105 (quite different)

And this game as well as Atelier Rorona, Totori, Ayesha, and Ar Tonelico 3 have the same bug where the game will eventually start looping forever at some random scene, usually with the camera going nuts: https://youtu.be/OJYVu8GtrVA?t=212

EDIT: And yes the game does the exact same things on OpenGL, Vulkan, and DX12 with no visual differences as far as I can tell.