P.S.: I was interested in finding a simplified setup, that explains the effect that you have encountered. I have cached the scenes, so you can see what I saw.
The problem lays in Toru’s surface as it has opposing faces, “out–in–in–out” (sides). The Axis values will be “+ - - +”, plus think about falloff/map, you get some canceled out areas.
https://www.amazon.com/clouddrive/share/WM7ZSflGWmz8KPB918HDVOpTosNsKwQQdS1brdzhTBF
The File …_21.c4d is just a showcase of the surface forces and how it should work, instead of pushing things into the infinity.
The File …_22.c4d shows the “Torus-Effect” split into two Cubes.
I hope that gives a good starting point to explore this phenomenon.