area deformation fill color problem

hello

I have this character face turnaround. I made for each one of parts it’s own area deformation and animated that to create other face views. [pics 1 , 2]

but problem is here. when I want to animate the up-lip deformation to create side face lip, the fill colour of this layer distorted. please help me. [ pics 3-5]
thanks

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5.PNG