I can only imagine that at some point you bend your wrist when you shouldn't? In lifting (as in archery), as far as I can think of right now, I always keep my wrists as straight as possible so that the weight goes to my lower arm in the strongest direction, like the upper bar of a T to the stem. To get range of movement with the weights, I adjust the angle at the elbow.

(Hard to describe without drawing a picture. Do you have a mirror available when you lift?)