Spline Mappers Tiling can't be turned off

Hi! The Tiling Mode settings of the Spline Mapper (both Grayscale and Color), aren't working for me.

It always acts as if set to H and V Tiling, even if I set to No Tiling, Horizontal Tiling or Vertical Tiling.

I expected it to work the same way as in the Spline Render (or any other node).

Here's an example where P1 and P3 of a spline are positioned beyond the 0-1 range:

What's also weird, is that the Spline (Poly Quadratic) switches its resolution to 2048x16 by itself in this setup and I can't change it to anything else.