Attaching a child gameobject to a gameobject pinned to a rope

[josemendez]

I've taken the rigidbody off the child object and that seems to have fixed it.

Glad you figured it out!

Parenting a rigidbody to another rigidbody does not make sense, regardless of it being pinned to a rope or not:

https://answers.unity.com/questions/6249...idbod.html

In newer Unity versions it *can* be done, but gravity will still affect the child rigidbody in world space, making it pretty much useless. Establishing spatial relationships between rigidbodies should always be done via joints.