Undeclared identifier 'normalDirection'

Shader error in 'Shader Forge/CubeMatSF': undeclared identifier 'normalDirection' at line 113

We have been unable to use a directional term with the refraction output. This is the case with both fresnel and manually calculated facing terms ( N.V ).

(I notice I'm also getting weird corruption on 1.24 ^ - Didn't get it on 1.20, but 1.20 has the normalDirection bug too)

This is a bit of a show stopper, any hints/fixes appreciated! :-)