Bump map doesn't work when I use rest position

[madiclutcher]

I'm using Arnold for Houdini. I'm trying to use the noise to control the bump map and im using the rest position.

Rest position works properly for the noise, but it doesnt work when I connect the noise to bump3d. When I switch the Position of bump3d to Object or world, it works properly.

First picture has the output of the bump3d and second one has noise input of the bump3d.