EDIT: UPDATE:
took off pin, that is not the problem. But I am spawning another object, could spawning the object at the same point break the joint?
Seems like you are using the pin behaviour in combination with the Physiscs behaviour, which is not recommended..
Mixing other behaviours with the Physics behaviour can (and probably will) create unexpected results..
Without seeing your events and/or capx it will be nearly impossible to answer your question.
We can only guess.