It works if you visited the website already but the first time it breaks: reloading fixes this while emptying the caches breaks it again. As another user pointed out the first click after emptying the cache doesn’t do anything at all even though the animation plays out just fine
EDIT: I’m on safari ios, latest stable (17.3.1 if I’m not mistaken)
Cause it’s so good to reload the whole webpage just to send a form