Matte Shadow object with SSS render element

[Dubbie99]

I have an object that is supposed to be a matte object. It has an AlSurface shader on it.
Unfortunately the SSS shows in the render element and nothing I do in the matte settings makes it disappear.


^^^ This is the diffuse render element - as I would expect the neck is invisible


^^^ This is the SSS element - I don't want to see the neck.


^^^ This is the cryptomatte - I guess it's fine to see the matte shadow object in here.

Is this intended behavior or something that slipped through the cracks?

Thanks,

Rhys