Wishlist button not working properly on some items

Hello, I am having this strange issue wherein some of the products are not being added. I tried both logged in and logged out and the problem persists. I have updated WordPress, Themes, and Plugins to the latest version and added a cache exception for the cookie: yith_wcwl_session_* but it still did not resolve the issue. Screenshot here: https://imgur.com/a/XY3xWtM

Please check this product here: https://www.soniashowalterdesigns.com/product/winter-wreath-backdrop/. The wishlist button does not work. But when testing this on the Staging Site (cloned from the live site), it works. Here is the link: https://wordpress-1554794-6028588.cloudwaysapps.com/product/winter-wreath-backdrop/

This product on the live site works properly: https://www.soniashowalterdesigns.com/product/sounds-of-christmas-wreath/

Please help me resolve this issue. Thanks!

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