I'm not sure what's going on here. The Warp Shader doesn't seem to effect all SSS in stack. As you can see, it doesn't effect one of the line, but the Vortex Shader (after the warp) does. The low level detail is from a fractal shader after the SSS stack, and before the warp.
Warped the SSS in question by itself and it works fine. So obviously a bug
Even warping both SSS shapes separately, one of the warpers will just not warp, but with one warper on either, works. Can't warp a stack, or in-between SSS's. Final Position is not warp-able so that doesn't help.