It’s Murphy’s law really: when I look at your site everything is working fine for me - and I tried a few different browsers.
When the user consents to using cookies an item is stored in the user’s browser: if for some reason that item cannot be found then the notice will keep showing every time they visit. This will happen if the user is using incognito mode for example and there may be other settings regarding localstorage in the browser that can cause problems. But as far as I can tell there should be no problem for you and your users under normal conditions.
BTW the calendar looks great in Romanian! Let me know if you have any issues with that / things that you can’t translate, etc.