Does anyone know why this happens?

Hi, I'm making a character animation. I have two layers on the main comp; a pre-comp Character and a background layer.
I've added Duik bones on the face and moved them. It really works well in the pre-comp preview, but when it's the (main) comp preivew, the Duik bones don't move at all, and it cuts off the character face.
Why does it happen?
Please help me:( I've experienced it before but I just re-created all the bones again to solve it.)
