Help Cloth material change on rendering

[petera3d]

Hello,

I use obi cloth from version 6, now I use 7.1

I have a skinned mesh with red material. 

In play mode , material changes and show weird. I think normal get wrong. Please see the video bellow :

Components on mesh's prefab are :

ObiSkinnedCloth
ObiSkinnedClothRenderer


Mesh info :
Vertices :  37040
Triangle : 68244