V-ray isn't respecting 3dsmax Shellmaterial settings

[markus_s_cg]

I just noticed Vray isn't respecting the Viewport/Render toggles on Shellmaterials. I'm using the latest 5.2, Max 2021.3, but for all I know it can be an old behavior.
It seems like V-ray is rendering the second material regardless on what toggles you set for viewport / render

[hermit.crab]

Seems to work fine. Maybe it's something specific to the scene? Could you simply and attach it here?