Add To Cart JavaScript Animations Reversed

I have a client with WordPress 4.4.2, WooCommerce 2.5.2, and Woo Radio Buttons 3.0.0

Recently, possibly after either WordPress or WooComemrce upgraded, the Woo Radio Button’s JavaScript animations involving the AddToCart button reversed. On page load, the button reveals with a “slideDown” animation. But the moment we select an option, the “slideUp” animation is called and the button disappears completely.

This appears to be a known issue, as I have seen it mentioned in the comments dating back to December 2015.

https://www.ads-software.com/plugins/woocommerce-radio-buttons/