ARKit / Foundation grey texture issues

Unity Engine
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1

Anything being rendered by the ARCamera (using foundation) is being rendered as a flat grey colour on iOS.

Android is completely fine and works as intended. Using a second non AR camera to render objects works fine in iOS, just that any Material applied (doesn’t matter what shader) to an object is being rendered as grey on iOS.

Anyone know of any possible fixes?

Edit: Only warnings (no errors) are in MetalHelper about deprecated funcs and conversion from MTLPixelFormat to U-Int loss of precision

2

Did you ever resolve this?

EDIT:
I fixed my issues with adding directional lights… I am not quite sure why not having any caused everything to go grey but childing one to the object seemed to fix the issue.