DDX / DDY nodes and ReflectionPlane bug

I’m using the DDX and DDY nodes to achieve a specific stylized look I want for my foliage shader, however it seems that using these nodes the shader wont reflect off of a ReflectionPlane.

Is this a known bug and is there a possible work around for this?

http://i.imgur.com/5Fj3Gqv.jpg

http://i.imgur.com/Ul6X0N0.jpg

Bump, any ideas? :slight_smile: