rabbit with uv

as we can see here, mesh acting weird when applying a material, there was also no uv on it: https://www.babylonjs-playground.com/index.html#95MJI8#37

Playground/scenes/StanfordBunny.mtl

@@ -0,0 +1,12 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl StanfordBunny
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.0 0.0 0.0
+Ni 1.450000
+d 1.000000
+illum 2