I am attempting to use a "Perimeter-Boss" to contour cut out a piece of wood with ramps to 2 different depths. Before selecting the ramp in the Depth Parameters menu the operation works exactly as expected. The tool goes to the specified depths progressively until punching past the stock the specified amount. Great. However, a plunge is not desired. I want to ramp in.

As soon as I select Ramp: Angle in the depth parameters the feature ramps to the specified depth beyond the stock and making a single lap around the part and ignores the First Cut Amount value. Why?

What am I missing here?