1) Modelling by Blender with ARP, export Humanoid to CC4 via CC/IC Pipeline add-ons.
2) CC4 + Blender - Edit Facial Expression and Characterisation (Finally success, grateful for CC/IC Pipeline & Blender Auto).
3) IC8 - import the model from CC4 -> apply animation (All okay).
4) Blender - import the Animated model -> Bones are mess shown below Q01.png.
5) Blender - import the Animated model from IC8 -> some "Shape keys" disappear especially the bone controlling parts like eyes, brow jaw ...
6) Blender - Retarget the Animation to Rigged Model by ARP -> parts of the Facial Expression incorrect or no response shown below Q02.png.

4 - 6) import model from CC4 to Blender obtains the same result as IC8 no matter whether using CC/IC Pipeline or only importing directly via Blender.

Almost a month, CC4 and IC8 has taken me to the hell ... bug ... crash ... incompatible ... restriction ...
If ARP is the critical problem, I have emphasized in previous post that Meta-Rig has many problems too (incorrect bone position, can't Rigify).
Or CC4 & IC8 are designed compatible and optimizing for creating character by themselves only? If so, I won't buy this kind of products which can only create specific style for animation and games. Spending our time and money to achieve your de-bug game is really exciting and incredible.