Unity5 Global illumination issue with 3d tiles.

Hello, I've been trying to setup Unity global illumination in Unity 5.6.1f for my farm game but I'm getting a very strange behavior. The grass tiles where there is a plant above are extremely darker than the others as you can see in the screenshot: ![alt text][1] I don't know what might be happening, I'll put some info about my light settings and materials here. **Both tiles are marked as static.** **The Grass Tile Mesh Renderer**
Reflection Probes: Blend Probes
Cast Shadows: Off
Receive Shadows: On
Lightmap Static: On
**The Grass Tile Material**
Standard Shader Material
Rendering Mode: Opaque
**The Plant Tile Mesh Renderer**
Reflection Probes: Blend Probes
Cast Shadows: On
Receive Shadows: On
Lightmap Static: On
**The Plant Tile Material**
Standard Shader Material
Rendering Mode: Cutout
**Lighting Settings** ![alt text][2] [1]: /storage/temp/96464-unity-farm-light-problem.png [2]: /storage/temp/96466-light-settings.jpg