Rhino & GH Crash When Moving Slider

I'm not sure if it's just my computer, but when I try to move the sliders associated with my "Height Limit" in this definition it causes my Rhino to crash. It might let me drag the slider just a couple of decimal places before it crashes. If I try to double click & type a value in it dies as soon as i press Enter. Never had a problem like this with any other definition or any of the other sliders in this one.

Could someone please let me know if it's something to do with that part of my definition that may be fixed if I approached that problem in a different manor, or if something else may be going on here.

Thanks!