Dose not work fur plug-in. Fur can't follow mesh.

Please look this tweet.

We have been making this short animation production.
The green character on the left is used fur plugin(Neo fur) .
His mouth’s Morphs (shape animation) is moving but the fur is not working sync with mesh. so we cant see moving mouth.
Do you know why fur can’t follow mesh?

I am trying with the following version.

(UE4 Version 4.14.3)
(UE4 Version 4.15.3)

Maybe When we use UE4 version 4.12, it was working.
After that, we had upgraded to version 4.14.
So Actually, It has not been working that fur from 2 years ago.

It is an our unsolvable problem.
I’m sorry I think this plug-in is an External plug-in.
I have tried various methods.
I want to complete this animation.

I wish your help. And give me if you have some hint.

this plugin

We have solved this problem. thanks a lot.
It was a simple problem.
The mouth moved!