That seems like a really complicated way to get some displacement. Why not just copy the parameters you like from your Banji shader into a regular C4D material and use the displacement there?
You shouldn’t have any problem as long as you continuously rasterize. You should do some research on that little button, it does alot more than keep vectors crisp.
It’s your keyframe interpolation. Select the keyframes you have that are giving you trouble, right click and go to Keyframe interpolation, click linear.