I try to make anything looking like the example in help manual. But it doesn't work. Why? I also tried to use the random asset to make anything looking like the image attached below. (standard mat with variation shader). The random asset also doesn't work.
I am still on vacation but i'll have a look when i return to work on monday. Haven't had a spin with R20 yet. Could very well be a bug too, considering how fresh the release is. I'll test it and let you know!