Avoid having arms and hands going into the body

I’m playing with Audio2Gesture in Machinema. The picture you see here should be the same pose. But something got messed up, and the character to the left have her arms and hands partly inside her stomach and hips. I’m supprised this happened, since the character is slimmer than the base skeleton. How can I correct this?

The character is a direct export from Character Creator 4 to USD.