Cookie only works on safari in private mode, not normal

So I have a simple cookie to display a news pop up on the site once a day. It works on all platforms except when using safari on iphones. On the ipad there is no issue.

I know the cookie works because the cookie WILL work on safari in private mode, but if you switch to normal mode it does not work. Tested on multiple devices. Let me know if anyone has any idea what might be going on. Here’s the cookie.

if (!Cookies.get(‘alert’)) { setTimeout(function(){
Cookies.set(‘alert’, true, { expires: 1 });
}, 1000);

Its on this page Test Page

Here is my site Read-Only: [LINK][1]