Maybe you violated some rules? Maybe you used coinbase to transfer crypto to gambling sites?
I do not know either I have violated any rules or not. For transferring fund to any gambling site can be a reason for temporary disable of my coinbase account?? I do not think they disable account for sending fund to gambling site. Are you sure that they disable account for transferring fund to any gambling site??
Yeah it can be one of the reasons, I don't know in your case.