Generate property has wrong case

When I declare a class variable like
public class MyClass {
private string _name;

}

and use Alt+Ins to generate the property R# is generating

public string name {
get { return _name; }
set { _name = value; }
}

In my naming styles I have Instance Fields set to have a _ as a prefix.

This always used to work, but seems broken after upgrading to 3.1