3 raycaster intersections, but all at the same point (with codesandbox)

Hi,

I’m learning ThreeJS, trying out the raycaster.
I have a scene with 3 spheres and a raycaster, now I see 3 intersections, but the 3 intersection points are all on the same spot (clearly visible in the example: ThreeJs Ray Issue - CodeSandbox)

Does anyone know if I’m missing something?
Thank you