Climbing With Your Teeth
You can't climb when your hands are occupied.

We've made changes to climbing grappling hooks and ladders. This will prevent accidental metagaming by climbing ladders and grappling hooks while holding something or doing something else, such as grappling someone or dragging a body. Allowing this kind of action was not intentional. Please let us know of any other unrealistic possibilities and tell us if there's any bugs related to this fix.