Cookiebot is designed to retain a user’s state of consent for 12 months.
Once twelve months have passed, the banner reappears upon the user’s next visit to the website.
However, browsers built on the WebKit browser engine interfere with this setup. One of the more popular browsers utilizing WebKit is Apple's Safari browser.
For visitors using Safari 12.1 and newer versions, consent information is only retained in the browser for 7 days. Thereafter, upon the user’s following visit to the website, the banner will appear again, requesting new consent be submitted.
This is one of several initiatives in Intelligent Tracking Prevention (ITP) version 2.1 in the WebKit browser engine.