Unfortunately, there's nothing you can do. All the sensors on the QuNeo put out 7 bit data, and pitch bend is usually 14 bit data (a resolution of 128, compared to a resolution of 16384). We are simply scaling 0-127 to fit a bigger range by multiplying each value by 127, and that ends up dropping a value either at the lowest or highest end of that data. We might be able to stretch the scaling, but I am sure that the engineers had a reason for doing it this way.
I'm going to ask around and see what I can dig up.