Marmoset High Poly Import Issues

I’m trying to bake Normal and AO maps in Marmoset for the first time, and I’m getting an issue regarding the High poly model importing. When I import it, it looks like this:


And it should look like this:

The High poly is not triangulated, and the low poly is. I don’t know if the high poly needs to be triangulated or not, but I had it working at one point with the non-triangulated High Poly mesh. I would love to get back to that state, because the shading gets thrown off when I have to triangulate the High poly.

I have tried importing a triangulated version of the FBX, and it loads in fine (minus the shading issues). When I re-import the non-triangulated version back into Blender, it shows no signs of those added faces.

I’ve been stuck on this for a while, so any help would be greatly appreciated.