Merge Actors with Forward Shading is Creating Funky Roughness Maps

Hey all
I am using the forward shading renderer for vr. When I bake down material texture maps with the “merge actors” tool all the maps turn out fine except the roughness map. It turns out completely over the top shiny.
If I use the same maps in the deferred renderer it looks perfectly fine.
Any ideas as to why the roughness map looks way to shiney in the forward rederer?

I’m a moron. The material was set to default to full metal