Why is texture sliding on different iphones?

Thats a very odd behaiviour I'm getting.

I'm doing a game and I have some fbx animations imported on it.

Everything works fine on editor and on iphone 6, 6 plus and ipads. But when I run the same game on iphone 5 the textures of fbx objects, offset to the wrong position and shrink a little.

I can run inside editor with free size and everything works fine no matter what size and proportion I choose and scale.

Anyone has any idea on what should i do or test? Has anybody experienced anything similar?

Thanks.