An ethical breach by a lawyer is grounds for banishment from the profession.

An ethical breach by a title insurance company likely violates its bylaws, and at the very least opens them up to liability.

It seems like this is a title error so the insurance company would be responsible. I don't see why a lawyer wouldn't report the error to the insurance company. It's billable time that the insurance company would need to pay for and they'd be working to keep their industry with clear deeds instead of faulty ones.