Bug Report 4.1.0 (b3728) @- not working if no values are in the programmer

The shortcut to reduce intensity by an amount, say 10% by typing the fixture number and @-10 will bring the fixture into the programmer at it's current value, not with the reduction of 10 points. If the fixture is in the programmer, the intensity will be reduced properly. The syntax seems to work correctly by using the @+ syntax both ways. I'm not sure if this has posted before, but I can't imagine I'm the first to find this.