Question Tearing UV Map .fbx import from blender

I have been making modular road pieces in blender with a texture atlas but when I import them into Unity I get the following issue
In blender it looks totally fine and when I reimport the model back into blender it's fine.

I have tried messing around with different settings in Unity and in blender, it seems like there is some sort of UV issue going on. I only have one(1) UV map on my models and they all use the same material with one texture. Other models work fine, just the roads seem to be broken.