Hello,

By default in WooCommerce when a variation product has more than 30 variations, it displays the value using AJAX in your case you have some products with 76 variations, so it does not cross out. But we have an option that can increase that value in Theme Settings -> Shop -> Variable products (e.g set there 100 value).

https://monosnap.com/file/SdQafB5WUxHuR9SLNPGw2WgCKQuzVx

Also, you have some plugins which are not loading the page with the variation products so you should disable the third-party plugins and recheck the issue

Kind Regards