How to use Sampler with instancedRigidBodies (Rapier)

[theodieu]

Hi,
I'm trying to figure out how to use <InstancedRigidBodies> (React Three Rapier) with a <Sampler> .
Here is a basic example spreading spheres over the surface of a cube's mesh:

<instancedMesh
    ref={spheres} 
    args={[
        sphere.geometry, 
        sphere.material, 
        spheresCount
    ]}
/>

<Sampler
    mesh={cube}
    instances={spheres}
    count={spheresCount}
    transform={({ position, normal, dummy: object }) => {
        object.scale.setScalar( Math.random() )
        object.position.copy( position )
        object.lookAt(normal.add( position) )
        object.rotation.x = Math.random()
        object.rotation.z = Math.random()
        object.updateMatrix()
        return object
    }}
/>

Now when I put this into an <InstancedRigidBodies>, all the spheres are back to original position, rotation and scale.
What is the proper way to apply back to the spheres the transforms set within the <Sampler> ?
Thanks !