Variant option buttons not selecting--sticking when clicked on

Hi guys,

In my store, when someone goes to select a type of product (for example theme or color) the buttons are sticking and won’t allow a customer to select unless they click outside of the box after clicking. It is this way on all my products with variant options. PLEASE HELP!

Check it out here in this product.

https://poppyandpinecreations.com/collections/valentines-day-collection/products/valentines-day-playdough-jars

Any insight would be helpful and appreciated. THANKS!