I figured out the cause, changing the ropes length at all using ObiRopeCusor.ChangeLength() and then disabling the rope and then re-enabling the rope is the cause. Will try and put a simple scene together
Edit: If use the sample scene "Crane" that comes with ObiRope and change the load to a static attachment and remove the rigidbodies you can replicate this, by simply changing the rope length with w or s and disabling the rope and re-enabling it
Edit: If use the sample scene "Crane" that comes with ObiRope and change the load to a static attachment and remove the rigidbodies you can replicate this, by simply changing the rope length with w or s and disabling the rope and re-enabling it