Hairfarm with HairMtl not visible in Reflections

[Moriah]

I have an hairfarm object with a vrayhairmtl applied on it, and a plane reflecting that object. With that shader applied there's no diffuse/specular component in the reflection, its just black. I have to use a vraymtl in order for it to work. Hdri + vraylight illuminating the scene. Max 2015 vray 3.20.03
Is this a known issue?

[vlado]

Is this a known issue?

No. Can you post an image or a test scene?

Best regards,
Vlado

[Moriah]

Sure, sent you an email with a scene. Thanks!