Hi,
Harry is away now. I’m Foster from the support team, I’m happy to help you with this. This problem does not relate our theme. It seems caused by Visual composer plugin. Because I tried to deactivate all plugin and keep WooCommerce and VC activate. After that, I activate the WordPress default theme (Twenty Seventeen) and it has the same problem.
So for this case, please use the custom shortcode as the suggestion of Harry, my teammate. Also please try to contact with VC to report this problem with us.
Hope you understand.