VectorTransform breaking PerInstanceRandom

[RoelBartstra]

Hey everyone,

I have noticed something rather strange with the material editor. When I use a PerInstanceRandom node as a diffuse it works fine:


But when I use that with a VectorTransform, which I use for my cubemap reflection, it looks like this:


As you can see the random red color generated by the PerInstanceRandom disappears. Does anyone know why this happens?

[RoelBartstra]

Is this the right section to post questions like this, or should I try on a different section of the forum, like programming/scripting?