I have a model in Cinema 4D R13, animated with the default biped character rig. Everything is working fine, except for the rotations of end controllers such as the hands head. I've tried fiddling with every fbx export setting there is, to no avail. The wrists/hands just won't rotate.
Has anyone encountered this before? I usually lurk hardcore around these parts, but this problem has me tearing my hair. Would deeply appreciate any insights into what might be causing it.
Here's the original (R13 version) Cinema 4D file of my placeholder character doing a placeholder macarena: