Strange Patterns on Objects in Scene

Hey everyone. We’ve recently developed an issue with strange patterns showing in scene. This does not happen in the Editor, only on iOS devices. Different devices give us different levels of patterning, from blocky tearing to an almost flannel like pattern. Any idea what might be causing this?

Looks like Z-fighting on first look, do you somehow have 2 mesh objects on every card or 2 cards overlapping each other? Maybe your cardback has triangles on both sides