I have a problem: cookieConsent.isCookieAllowed is only available after refreshing the page. So I have no cookies allowed on the first page hit after the user accepted already all cookies. Any solutions for that?

You are right, allowed scripts have not been refreshed immediately after user's consent. I released version v1.1.0 that fixes this issue. It is necessary to define allowed scripts in standalone partial partials/cookieConsent/_scripts.htm. Read DOCUMENTATION section for complete setup example.