In Character Creator 4.22, if I export a CC Game character FBX with the Merge Materials function enabled, the resulting FBX contains blendshapes but the blendshapes are corrupted. Any associated geometry collapses when the blendshape weight is turned on (image 1). It also seems like within CC, the facial profile becomes corrupted after export (image 3).
If I change nothing about my export process except disabling the Merge Materials function, the resulting FBX and blendshape geometry work properly. I've also previously exported CC Game characters using the Merge Materials function with no issue in prior versions of Character Creator.