Deform node in action and Magnet size limits


I’ve resized my deform node grid in action to taste- let’s say a quarter of the plate size. However there seems to be a lower limit to the size of the magnet which I can’t make smaller. This is not the case with a bicubic with which I can reduce the size of the magnet tool further. Is this a known bug? Feature?

So I think I found the solution. Every time I add an extra axis to the chain of the deform node it stops the magnet from going below a certain size.